To sound; to make a noise.
Any unwanted disturbance within a dynamic electrical or mechanical system. This can include electrical, electromagnetic, or acoustical energy.
(1) A distortion or irregular fluctuation in a transmitted signal. (2) Anything that interferes with communications.
The miscellaneous rubbish that gets added to a signal on its journey through a circuit. Noise can be caused by capacitive or inductive coupling, or from externally generated interference.
Any random or periodic non-data signal in the measurement.
An electronics term that covers all types of unwanted electrical signals. Noise signals originate from such sources as fluorescent lamps; walkie-talkies; amateur and CB radios; electronic machines being switched on and off; power surges; and others. Electronic equipment must be able to tolerate increasing amounts of electrical interference. The quality of electronic equipment is directly proportional with its ability to reject and otherwise ignore noise.
For Audio: unwanted sounds that interfere with the intentional sounds, or unwanted hisses or hums inevitably generated by the electronics in or near the audio equipment. For Video: electronic interference like that which shows up as "snow" or a waterfall like digitizing effect.
A term used to describe the occurrence of pixels within in an image that contain random colors. Also refers to a filter in Photoshop that can sometimes be used to give a smoother, more natural appearance to graduated screens. This filter is also used for special effects.
Any unwanted signal that affects the video signal. Usually random electrical energy or interference. In video, noise can produce a random salt and pepper pattern over the picture. Heavy video noise is called snow.
Unwanted elements added to a signal such as hiss, hum, whine, static, or buzzing. In video, it can appear as snow on the image.
Unwanted electromagnetic radiation within an electrical or mechanical system. An operational amplifier circuit having no phase inversion between the input and output.
Extraneous or unwanted signals on a network. Excessive noise impedes network operation reducing the effective speed of the network.
Unwanted electrical signals, introduced by circuit components or natural disturbances, that tend to degrade the performance of a communications channel.
Undesirable attribute of video often occurring when video levels are overly boosted or saturated.
Any unwanted disturbance affecting a measurement (as of a frequency band), especially that which degrades the information-bearing quality of the data of interest.
Interference on a communications channel often caused by nearby electrical equipment, power lines, or poor connections.
any part of a signal which contains unwanted randomness. In audio, noise makes the track have "hiss" or "fuzz". In video, it can appear as pixel "shimmer" or "blotchy" areas. Noise generally interferes with compression.
Unwanted influences that interfere with the reception of the desired signals.
In communications, extraneous signals on a transmission channel that degrade the quality or performance of the channel. Noise is often caused by interference from nearby power lines, from electrical equipment, or from spikes in the AC line voltage.
Unwanted sound in an audio pickup.
1. In video, an aberration that appears as very fine white specks (snow) and that increases over multiple generations. 2. In audio, a sound that is usually heard as a hiss.
Whatever you don't want to hear. Could be hum, buzz or hiss; could be crosstalk or digital hash or your neighbor's stereo; could be white noise or pink noise or brown noise; or it could be your mother-in-law reliving the day she had her gallstone removed.
meaningless sound produced as a by-product of unintentional or unrelated activities. In electrical circuits, the random noise "hiss" produced by all components in the circuit. Unless dealt with properly this background noise can build up or become amplified to the point that it interferes with the desired signal or makes the circuit unusable. See Signal to Noise Ratio.
Term used in communication theory to indicate an undesirable extraneous input which interferes with the primary message signal. See Communication Process.
interference in the transmission of a message, which includes physical and/or mental factors
The difference between the predicted and observed values of a model due to random error including missing and incomplete data.
any unwanted signal that affects a wide or narrow band of frequencies.
An unwanted or unpleasant sound.
Any extra energy (i.e., unmodulated and undesired energy) that is present to some degree in every signal.
the random fluctuations that is always associated with a measurement that is repeated many times over. Noise appears in astronomical images as fluctuations in the image background. These fluctuations do not represent any real sources of light in the sky, but rather are caused by the imperfections of the telescope. If the noise is too high, it may obscure the dimmest objects within the field of view. (See also text in deconv and SelfCal.)
This is inherent in all electronic circuits. In a video signal this appears as snow or graininess in the picture.
Any spurious background sounds, usually of a random or indeterminate pitch: hiss, crackles, ticks, pops, whooshes.
Usually an undesired electronic signal that has no relationship to the desired signal in a system. Noise is usually the result of unavoidable random electron motion in electronic devices. Noise may be simulated mathematically by a random number generation process.
A distortion in a signal. In audio, noise causes the track to "hiss".
The degree of randomness or unpredictability in a signal. Noise components are a primary determinant of the quality of an image.
Unwanted electrical signals which exist on a communications medium. Noise can generate errors during data transmission.
interference or distortion in video or audio
Any extraneous sound or signal that intrudes into the original as a result of environmental noise, distortion, hum, or defective parts in the equipment.
Undesired perturbations in the accelerometer output signal which are generally uncorrelated with desired or anticipated input accelerations. Noise in the accelerometer output is of two types: intrinsic and seismic. Intrinsic noise is generated within the accelerometer and represents the limiting factor in making measurements. Intrinsic noise is random in nature and is characterized by a noise power spectral density (PSD) curve. Seismic noise is a true input acceleration (usually unanticipated by the user). It results from noise sources in the local environment (running motors, seismic shocks, etc.) and their transmission to the accelerometer through the mounting structure which supports the accelerometer.
An undesirable signal that is irregular and is riding on top of the desired signal.
Undesirable electrical or acoustical disturbances in a communications system. Noise can generate errors in transmission.
1. Undesired sound. Usually refers to static, hums, or buzzes in a component or system. 2. Pink noise or white noise.
(1) video - Electron interference--snow. (2) audio - Unwanted sound distortion--static.
Unwanted interference in audio or video signals.
Unwanted sound that interferes with hearing or annoys or irritates.
1. Any unwanted signal, usually not linked with TV picture content, for instance, interference from adjacent channel. 2. In general: a random signal as opposed to a regular signal, e. g. mains hum usually is not normally considered to be 'noise'.
Unwanted acoustic or electromagnetic disturbances, as opposed to desired signals. See signal.
In video, any unwanted signals that interfere with, or degrade the quality of an image.
In general usage, noise can be considered data without meaning; that is, data that is not being used to transmit a signal, but is simply produced as an unwanted by-product of other activities. Noise is still considered information, in the sense of Information Theory.
Undesirable electrical energy that interferes with accurate measurements.
a. Audio: unwanted sounds that interfere with intended sounds; or unwanted sound signals; b. Video: electronic interference that shows up as snow. [Source: PSSC
An unwanted frequency current or voltage signal appearing over a wide frequency spectrum and having no useful purpose.
Any unwanted signal present in the total signal.
(1) Unplanned energy introduced onto a communications path, resulting in transmission errors. Undesirable signals bearing no desired information. (2) The unpredictable difference between the observed data and the true process. non-blocking - A switching network having a sufficient number of paths such that an originating call can always reach any other idle station without encountering a busy signal.
Unwanted signals on or with a useful signal which can distort its information content.
Unwanted signals generated by every electronic component. Noise in a video signal can cause a grainy or snowy effect on an image
Signal interference generated by electrical components or external sources that can disrupt or corrupt data transmissions.
Data or unidentifiable marks that may appear as bright specks in dark areas of a scan owing to electrical interference in the CCD sensor and associated circuitry.
Random electrical signals, generated by circuit components or by natural disturbances.
A random appearance of pixels on an image to create an effect or decrease definition.
Interference of an electrical or acoustical nature. Random noise is sometimes used as a test signal in acoustical measurements. Pink noise is random noise whose spectrum falls 3 dB per octave: it is useful for use with sound analyzers with constant percentage bandwidths.
abrupt, random, small changes in displayed sensor signal (in electrode, usually due to the pickup of strong static charges). Noise may be caused by air bubbles, poor conductors, or high electrical resistance somewhere in the circuit.
Electrical disturbances that corrupt and degrade signals transmitted over cables or radio frequencies.
Electrical energy or interference that appears on the screen as a grainy picture or "snow".
an undesirable background interference or disturbance that affects image quality. NSA - the number of signal averages performed during the scan. See also NEX and Signal Averaging.
Unwanted sound that obstructs the hearing of the sounds we want to hear.
Any disturbance that interferes with data transmission and corrupts the quality of the signal.
the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience; "modern music is just noise to me"
electrical or acoustic activity that can disturb communication
incomprehensibility resulting from irrelevant information or meaningless facts or remarks; "all the noise in his speech concealed the fact that he didn't have anything to say"
a loud or disagreeable sound, or combination or succession of sounds
a resonance that interferes with the audition of a message in the process of emission
a sound and a sound is a set of vibrating molecules referred to as sound waves
Sooner or later, you'll hear the term signal-to-noise ratio. This is merely a way of describing how much useful material (signal) compared to useless material (noise) is contained on a given newsgroup.
An unwanted component of a signal. Meaningless signals similar to radio static. Some noise interferes with the correct output of a signal.
Building command to play music file on top of other sounds and just once instead looping After name: cyber-engaged or cyber-married
Is any unwanted signal that affects the quality of an audio or video signal.
Electrical interference that adversely affects data wave.
Any undesirable electrical signal, from external sources such as ac power lines, motors, electrical storms, radio transmitters, as well as internal sources such as electrical components.
Unwanted disturbance within an electronic system. Interference present in a video picture.
In the scanning context, this refers to random, incorrectly read pixel values, normally due to electrical interference or device instability.
An extraneous, unwanted signal, often over an analog phone line, that can cause communication interference or transmission errors. Possible sources are fluorescent lighting, radios, TVs, lightning, or bad wiring.
Unwanted signal superimposed on a true signal.
Unneeded network signals that degrade network performance.
A distortion of the normal sine waveform.
Sprinkles of random color (grains or shadows) that generally occurs at a high ISO setting.
technical or semantic obstacles; that is, anything that interferes with the clear transmission of a message (e.g., low visibility, poor ink quality, static electricity).
irrelevant or useless posts.
Static intereference in an audio file.
(1) Undesired sound. By extension, noise is any unwarranted disturbance within a useful frequency band, such as undesired electric waves in a transmission channel or device. (2) Erratic, intermittent, or statistically random oscillation (ANSI S1.1-1994: noise).
A general term used in electronics to indicate any unwanted electrical signal, unrelated to the original signal. Video noise is generally manifested as snow, graininess, ghost images or picture static induced by external sources such as the power-line grid, electric motors, fluorescent lamps, etc. In audio, noise is generally manifested as hiss and static.
Random variations or error in a data set.
Electrical interference in analogue electrical equipment. In digital cameras this manifests itself as pixels of the wrong colour in dark areas of an image, shadows etc. The smaller the size of pixels on a digital camera's sensor,[ larger sensors are less noisy than smaller ones], or the higher the iso setting used, the more prevalent it becomes. Leads to poorer image quality.
Extraneous or meaningless data that sometimes obscures data analysis.
Noise is visual "clutter" that appears on the display. It's caused by too many undesirable signals being picked up by the fish finder (typically from electrical sources such as trolling motors, alternators, spark plugs, radio transmitters, etc.) Manually adjusting the sensitivity helps fine-tune the sonar to show the most detail with the least noise. For automatic sensitivity adjustments for the best picture possible, Advanced Signal Processing is also found on all Eagle units.
Undesirable sound that interferes with rest, sleep, mental concentration, or speech communication.
Unwanted sound that is obtrusive or interferes with listening. To qualify as interference, noise does not have to be excessively loud.
Random small variations in voltage or current in a circuit due to the quantum nature of electronic current flow, thermal considerations, etc.
A component, normally random, of deviations in output voltage. Noise is undesirable, and normally will be specified in conjunction with ripples. See also PARD and Ripple. read more...
Any sound that is undesired or interferes with one's hearing. In an exhaust system, noise can come from the tailpipe, the surface of the exhaust system (muffler shell, for example), or from the structure of the system transmitted through the hangers.
An undesirable electrical signal from an external source such as an AC power line, motors, generators, transformers, fluorescent lights, CRT displays, computers, radio transmitters, and others.
Any sound not occurring in the natural environment, such as sounds emanating from aircraft, highways, industrial, commercial and residential sources. 2. An erratic, intermittent, or statistically random oscillation. It is measured in decibels.
An unwanted high-frequency electrical signal that alters the normal voltage pattern (sine wave). Noise may be either high amplitude or low amplitude.
An unwanted grain pattern in an image often caused by slow shutter speeds and high ISO settings.
Unwanted signals that distort or affect the signals of interest, and one of the reasons filters are used. Noise may come from external sources (Radiated noise such as EMI) be generated by system components (Amplifiers, resistors or clocks) or just may be an undesirable part of the signal itself.
unwanted low-level electrical interference that is unrelated to the switching of transistors. It is often called "ripple and noise" and can be assigned a peak-to-peak value with a specified bandwidth.
An undesirable electrical signal. Noise comes from external sources such as the AC power line, motors, switching power supplies, fluorescent lights, soldering irons, CRT displays, computers, electrical storms and radio transmitters. and from internal sources such as semiconductors, resistors, and capacitors.
Unwanted random signal that sounds like hiss on a record
Any extraneous or unwanted signal in a cable or electrical circuit which tends to interfere with the signal normally present in or passing through the system (e.g. EMI, RFI, tape or amplifier thermal noise).
electrical energy that interferes with a measurement, generally random. A noise filter averages out the waveforms to approach the real signal, but takes longer to acquire the waveform.
Extrinsic signals that corrupt a data transmission. Noise can come from crosstalk and other forms of electromagnetic interference.
a random oscillation that is not periodic. At any point in time all frequencies have an equal probability of occurring. The amplitude of each frequency is also probabilistic. (H:553)
Random, typically unwanted energy or electrical variations.
sound produced by irregular vibrations in which the sound waves have no smooth pattern; any sound that is considered unwanted, unpleasant or too loud
An ever present unwanted background signal that needs to be compensated for or removed
An undesirable electrical phenomenon which is generated by various means (i.e. switching large loads , light dimmers, electrical storms). This phenomenon consists of random voltages and currents induced into electrical circuits, if severe enough, erratic operation of these circuits can result.
Any extraneous signal that invades the transmission of electrical pulses or frequencies along a cable. Noise is measured as impulse or Root-Mean-Square (RMS). Nominal Velocity of Propagation (NVP) The speed of data transmission along a cable relative to the speed of light in a vacuum.
Noise is an unwanted signal which worsens the reception of the desired information and is usually expressed in degrees Kelvin or in decibels.
The effects produced by random electrical fluctuations in radio receivers. These tend to conceal or distort the effects of true celestial radio power, which also has the character of noise.
A sound meter is held directly in front of the driver. Its scale is set to report in dBA, essentially a unit of sound pressure corrected to match sensitivity of the human ear. (We hear frequencies between 20 and 20,000 Hz, although we are most sensitive to those in the 4000-Hz range.) We report average noise levels in several settings: at Idle in neutral; Maximum in 1st gear; and at a Constant 50 and 70 mph. We ignore peak readings traceable to bumps and undulations in the road.
Noise is the aperiodic, random component of undesired deviations in output voltage. Usually specified in combination with ripple.
Unwanted electrical or acoustic energy.
Unwanted electrical interference picked up on a signal cable.
a term used to describe the random nature of data to stray from its true value. This can be analagous to the hissing sound emanating from a radio when the signal is adversely affected by atmospheric conditions or extreme distances.
Unwanted fluctuations superimposed on electrical signals
Any element of a video or audio signal with unwanted randomness. In audio signals this is generally the adding of hiss or fuzz noises, while in video an image can appear to have a grain effect, or another unwanted change of the original image.
is unwanted sounds or video signals.
Random information in a communications information such as static heard on a radio when station is tuned in or the â€˜snowâ€™ seen on a television when no signal is being broadcast. Noise is very difficult to compress because it contains no redundant information.
Unwanted sound that is annoying or interferes with listening. Not all noise needs to be excessively loud to represent an annoyance or interference.
A random and/or persistent induction of unwanted electrical or radio frequency signals onto a cable which interferes with and/or degrades the quality of the signal.
An unwanted signal produced by all electrical circuits working above the absolute zero. Noise can not be eliminated but only minimised.
Any unwanted signal, such as in audio and video that adversely affects the quality of the picture or sound.
Irrelevant or imprecise data present in input patterns; random values added to all the weights to prevent the network from getting stuck in a local energy minima; imprecise information such as seeing most of a box that is partially hidden; imprecise data purposely put in the initial state to improve a network's accuracy.
The word "noise" is a carryover from audio practice. Refers to random spurts of electrical energy or interference. May produce a "salt-and-pepper" pattern over the picture. Heavy noise sometimes is called "snow."
Any undesired signal(s) from any source(s) that interferes with the desired signal. Most noise is due to random fluctuations in the power supply, although some noise in a system may be caused from other nearby systems, defective components, electrical storms, etc.
meaningless data interfering with the acquisition of information.
An unwanted signal produced by all electrical circuits working above the absolute zero. Noise cannot be eliminated but only minimized.
Extraneous factors that create unplanned distortion or interference in the communication process.
An unwanted portion of a signal such as hiss, hum, whine, static, or buzzing.
A signal frequency(s) that may be riding on top of the power line sine wave. A number of systems use the power lines to carry signals and data to other locations. Attempts to filter out the "so called noise" may disrupt the current or future operation of these systems. It is wiser to provide L/C filtering immediately in front of sensitive equipment, if it is ever needed. It seldom is
Any unwanted, introduced signal or sound in a communications system or speaking environment. The sources of noise are many, and can be both acoustical (HVAC, street sounds, crowd noise, reverberation and echoes, etc.) and electronic (thermal noise or hiss, hum, etc.). Noise can be correlated with the desired speech signal (reverberation) or it may be uncorrelated (background noise, babble). Return to
Any sound which annoys or disturbs humans or which causes or tends to cause an adverse psychological or physiological effect on humans.
An extraneous signal in an electrical circuit, capable of interfering with the desired signal. Classes of noise include burst of popcorn noise, intermediate frequency noise at low audio frequencies, white (thermal) noise, etc. Signals from power supply or ground line coupled into an amplifier output may be considered noise.
Any unwanted sound other than the signal. Examples include tape hiss, electronic noise generated by amplifier circuits, earth loop induced hum, and random hums, hiss and spurious electronic clicks and pops (e.g. from static electricity on vinyl records).
The generally unwanted component of a signal that tends to interfere with the measuring process. The noise can be random or periodic, and often varies in intensity
Any component of a transducer output signal that does not represent the variable intended to be measured. Nyquist Criterion — Requirement that a sampled system needs to be sampled at a frequency greater than twice the bandwidth of the signal to be sampled.
an unwanted voltage or current in an electrical circuit.
Irrelevant, meaningless, or erroneous information added to a signal by the recording or transmission medium or by an encoding/decoding process. An advantage of digital formats over analog formats is that noise can be completely eliminated.
Any unwanted sound. Note that not all sound is considered noise.
The unwanted or uncontrolled electronic buildup in a device. If the noise become to high the signal is degraded to an unusable condition.
Random or regular interfering effects in the data which degrade its information-bearing quality.
Unwanted changes in waveform that occur between two points in a transmission circuit.
Not signal. Aliasing is a specific kind of noise where the energy from frequencies greater than the Nyquist critical frequency is spuriously reflected back into the sampled signal.
Undesired signal(s) that corrupts the original video signal and may reduce image quality.
Unwanted electrical or electromagnetic energy that can degrade the quality of signals and data. Noise occurs in digital and analog systems, and can affect files and communications of all types, including text, programs, images, audio, and telemetry.
Unwanted ambient electrical signals found in the operating environment of RFID equipment.
(1.) A disturbance that affects a signal and potentially distorts the information carried by that signal. (2.) Random variations of the characteristics of any entity, such as voltage, current, or data. (3.)A random signal of known statistical properties of amplitude, distribution, and spectral density.
One of two results in any experiment; that which shows up in the experimental data but is not something the experimenter is concerned with, for example, in an ESP experiment, the noise is the number of correct guesses due to chance, or possibly the unknown factors that may cause a person's ESP ability to vary during the experiment; see also Signal.
In a cable or circuit, any extraneous signal which tends to interfere with the signal normally present in or passing through the system.
Any undesired interference with the conversion of light (an analog signal) to a digital capture (a digital signal) that causes a visible disruption to the integrity of the image. The capture can be via digital camera or the scanning of film or print. Digital photography noise is manifested as missing, incomplete or extraneous pixel data and generally falls into two categories: luminosity noise and color noise. Compare to artifact.
Unwanted signal that is added to a transmitted message while being carried along a channel, and distorts the message for the receiver. See: channel.
communications: Any unwanted data mixed in with the good stuff you're after. In telecommunications it is static in the phone line or satellite link. In graphics it can be odd bits of dirt on your image.
Describes unwanted parasitic signals, which are created when other signals are wrongly interpolated as light signals.
That part of a geophysical measurement that the user does not want. Typically this includes electronic interference from the system, the atmosphere ( sferics), and man-made sources. This can be a subjective judgment, as it may include the response from geology other than the target of interest. Commonly the term is used to refer to high frequency (short period) interference. See also drift.
Any sound that is considered to be undesirable because it interferes with speech and hearing, or is intense enough to damage hearing, or is otherwise annoying.
Random or repetitive events that obscure or interfere with the desired information.
In acoustics, unwanted sound; in telecommunications, electromagnetic interference (such as static) from an outside source.
Unwanted or nuisance sound.
An undesirable signal which is irregular yet oscillatory that is super imposed on the desired signal. See common mode noise and normal mode noise.
Extraneous speckles on an image. See speckle.
Unwanted signals (electrical signals other than the power line voltage) that negatively affect the circuits of sensitive electronic equipment in which they occur. Effects power, phone, and data lines and causes operation errors, data corruption, terminal lock-ups.
Random, unwanted interference with the signal to which you're trying to watch or listen. In audio, noise takes the form of hiss or static. In video, noise is picture "snow," random flecks or specks of unwanted color.
Unwanted energy that degrades a signal. Noise is always present to some extent within any signal.
Any undesirable sound reproduced in an audio system.
An unwanted electrical interference on the signal wires.
1 Unwanted sound of no specific frequency or amplitude. 2 Random sound of many frequencies not harmonically related (buzzing, hiss, pops, static, whine, etc.).
Irrelevant or meaningless data resulting from various causes unrelated to the source. Random, undesired video signals.
the ultimate dead air in television: no signal at all. Noise is the irritating racket and snow that wakes you up on the couch after the station signs off.
Any unwanted electronic signal, or an unwanted audible sound (from fans or cooling devices).
Video Signal interference that usually appears as graininess or snow on the picture.
Often abrasive, this style contains distorted samples and white noise.
A low-voltage, low-current, high-frequency signal that interferes with normal network transmissions, often data.
Unwanted electrical signals that produce spots on the image.
Unwanted electrical signals, which produce undesirable effects in the circuits of the control systems in which they occur. See electrical interference.
A disturbance that affects a signal; it can distort the information carried by the Signal.(2) Random variations of one or more characteristics of any entity such as voltage, current or data. Loosely, any disturbance tending to interfere with normal operation of a device.
The random component on the power source output, which is unrelated to source and switching frequency. Noise is typically expressed in peak-to-peak units over a specified bandwidth.
Fabric window fashions can cut down on echoes. Sound reverberates in vacant spaces, and becomes distorted. Your window coverings professional can suggest the right product to add that will absorb the sound. The features that make a product energy efficient can also help minimize noise. That's why honeycomb shades and shutters are good options for windows that face busy streets, parks, or playgrounds. Another way to reduce noise in a room is with fabric window fashions. The heavier the fabric the better it will insulate, however, you will want to consider whether a heavy treatment allows enough light to filter in.
Extraneous signals in a system causing interference (hum, hiss, rumble) and sound distortion.
Random, sporadic, or multi-frequency electrical signals that become part of a transmission making the signal or information more difficult to identify.
Undesirable video or audio signal interference: typically called snow, hiss or hum.
Noise is the result of distortion of the normal line power sine wave by hundreds or thousands of small increases in voltage similar to EMI/RFI, though it encompasses lower frequencies. The amplitude of this type of disturbance is less than a surge but may be as low as EMI/RFI.
Random information that distorts an image, especially the background distortion of an analog image before it is converted to digital format.
is an unwanted signal generated by every electronic component. The noise in a video signal causes a grainy or snowy effect on the image.
Used in both audio and vision terms; this is undesirable interference of sound and picture.
Extraneous responses or disturbances that add to or subtract from a sensor's data signal in random or systematic fashion.
Noise is known as electrical signals that produce negative effects in the circuits of the electronic systems.
Extraneous and unwanted signal disturbances.
The meaningless extra bits or words which must be ignored or removed from the data at the time the data are used.
A general term used in electronics to indicate any unwanted electrical signal, unrelated to the original signal. In audio, noise is generally manifested as hiss and static. In video, noise is generally manifested as snow, graininess, ghost images or picture static induced by external sources such as the national power-line grid, electric motors, fluorescent lamps, etc.
Noise is defined as unwanted electrical signals with broadband spectral content lower than 200 kHz which are superimposed upon the power system voltage or current in phase conductors, or found on neutral conductors or signal lines. Basically, noise consists of any unwanted distortion of the power signal that cannot be classified as harmonic distortion or transient. Noise is caused by power electronic devices, control circuits, arcing equipment, loads with solid state rectifiers, and switching power supplies. These noise problems are often exacerbated by improper grounding that fails to conduct noise away from the power system.
Process input that consistently causes variation in the output measurement that is random and expected and, therefore, not controlled is called noise. Noise also is referred to as white noise, random variation, common cause variation, noncontrollable variable.
Unwanted sounds or disturbances which interfere with the desired sounds of an audio system.
Noise is any sound which at the time of reception is unwanted or disturbing.
Energy always present on any signal.
It is not a question of the noise which the scanner makes. It is defined as the electric disturbances thus being able to result in an inaccurate reading of certain pixels.
Noise in general refers to any unwanted sound. White noise is a sound whose power per unit bandwidth is constant, on average, over the range of audible frequencies. It usually has a normal (Gaussian) distribution of instantaneous amplitudes
An undesirable electrical interference to a signal.
Graininess in an image, caused by too little light or by defects in the electrical signal generated during the image-capture process. Top of this page
Any signal that produces undesirable sound on a communication channel. Major sources include thermal, microwave fading, electrical interface, cross talk, and electrical-mechanical impulses.
An undesirable electrical signal that degrades the desired video or audio signal. Noise is typically seen as snow, or heard as hiss.
Refers to sound, signal, or data that was not originally intended to be included.
A term used in the field of audio to describe interference that can lead to impure sounds and distortion. Noise may occur, for example, as a result of faulty microphones or recording equipment (Colour Noise).
Random, unwanted additions to a signal. Waves
(1) An unwanted signal or a disturbance (as static or variation of voltage) in an electronic device or instrument; electromagnetic radiation (as light or radio waves) that is composed of several frequencies and that involves random changes in frequency or amplitude. (2) A disturbance, especially a random and persistent disturbance, that obscures or reduces the quality or clarity of a signal.
(see random sample and statistical noise) is the error term in every model fit to the observations. [pg 90, 5; pg 185, 2
In bitmap editing, random pixels on the surface of a bitmap, resembling static on a television screen.
An undesirable electrical signal, noise comes from external sources such as AC power lines, motors, generators, transformers, fluorescent lights, CRT displays, computers, and from internal sources such as semiconductors, resistors, inductors, and capacitors. Can cause errors in readings of not filtered.
Undesirable signals that can increase the amount of error. Examples of noise include radio frequency interference, electromagnetic interference, hum from power lines and broadband or white noise.
Any undesired electrical disturbance in a circuit or communication channel. When combined with a received signal, it affects the receiver's ability to correctly reproduce the original signal. Also known as Thermal Noise.
Any unwanted contribution to a signal, which may be natural or caused by interference from other signals. Back to open architecture Computer industry term for a system design that allows computer programs to run and data to travel across a wide variety of transports and to be delivered to a wide variety of platforms. Back to packet The unit of data that is routed between an origin and a destination on the Internet or any other packet-switched network. When any file (e-mail message, HTML file, GIF file, URL request, etc.) is sent from one place to another on the Internet, the Transmission Control Protocol (TCP layer of TCP/IP divides the file into packets - "chunks" of an efficient size for routing. Each of these packets is numbered and includes the Internet address of the destination. The individual packets for a given file may travel different routes through the Internet. When they have all arrived, they are reassembled into the original file (by the TCP layer at the receiving end).
Any unwanted and unmodulated energy that is always present to some extent within any signal.
Any unwanted video audio such as snow, hiss, or buzz, that generally results from equipment malfunctions, poor production practices, or other environmental factors.
a random unwanted signal that is imposed on the wanted output signal.
Any undesirable disturbance or spurious signal.
Undesirable electrical or electromagnetic signals.
The word "noise" originated in audio practice and refers to random spurts of electrical energy or interference. In some cases, it will produce a "salt-and-pepper" pattern over the televised picture. Heavy noise is sometimes referred to as "snow".
Unwanted variations in electrical output that are unrelated to the switching frequency.
Any unwanted signal; a disturbance that is not part of signal from a specified source. In electrical or induced polarization (IP) surveys, noise may result from interference of power lines, motor-generators, atmospheric electrical discharges, etc. See cultural noise.
A sound that typically does not carry any positive benefits and typically produces annoyance.
Undesired signals that corrupt the original video signals and may reduce the image quality.
An unwanted portion of a signal such as static, hum, hiss or buzzing.
Unwanted electronic or optical signals that cause interference in the reproduction of data or an image. Typical noise sources in electronic imaging include but not limited to KTC noise, column noise, fixed pattern noise, random noise and so forth.
Refers to any unwanted electrical signal, unrelated to the original signal. Video noise is generally manifested as snow, graininess, ghost images or picture static that could be the result of external interference such as fluorescent lamps. An advantage of digital formats over analog ones is that noise can be more or less eliminated.
A source of random voltage fluctuations.
1. Any function, often of time but possibly of any variable, with a substantial lack of correlation between values at successive times. For example, the autocorrelation function of white noise is a sharp spike: Its value at any instant is correlated only with its value at that instant. 2. Any change in a signal that degrades its capability to transmit information (e.g., the audible static on AM radio resulting from lightning discharges See meteorological noise.
Unwanted signal consisting of a mix of random electrical agitations. Also the sum of all unwanted signals such as hum, hiss, rumble, interference, distortion, etc. NTSC: The television standard adopted by Japan and America.
Any unwanted electrical signals contaminating the signal to be measured.This noise may be electronic noise which is an artefact of semiconductor construction techniques and can be reduced. Alternatively the noise may be caused by environmental factors. This type of noise can be the result of poor positioning or screening of signal wiring. This may result in mains frequency or RF pickup contaminating the required signal.
Electrical disturbance usually caused by excessive electromagnetic interference.
the variation in the signal produced by the instrument. Noise is caused by short and long-term variations in different instrument components.
Noise is an electrical term for interference, and is due to the random thermal motion of electrons. Therefore it is based on the temperature of the surroundings. For example, a Satellite points at an Earth Station (Earth being roughly 270 Kelvin). The Earth Station points into space (blank space being roughly 80 Kelvin). Occasionally the sun is behind the Satellite and so the Earth Station sees an infinite temperature. A few times a year links suffer station-sun interference.
Unwanted signal interference - usually separated into various forms of signal cross talk and random noise generated by means internal to the sensor. Object plane The plane created by tracing ray paths backwards from the active detector elements through the focusing lens assembly, through the scanning mechanism to project the active field of focused image area in space. The object plane is an optical description of what the system can focus. Ocular The eyepiece of an optical system.
A general, informal term for any type of interference, most commonly electrical interference or myopotentials.
electronic interference to an audio or video signal caused by the inherent limitations in equipment (see Electronic noise). NTSC: (National Television Systems Committee): used to describe the 525 line TV/video system commonly used in the USA and Japan.
Perceived sounds not in the original soundtrack. Such things as hiss, crackle, pops, hum, and buzz, are typical of the types of extraneous signals described as noise. Inherent noise in the electronic processing in any sytem is measured in decibels relative to the amplitude of the original signal. Sounds perceived as noise are heard in contrast to the sound that is the object of attention. Thus, a noise signal measured at 15 deciBels below the output of Tchaikovski's 1812 Overture finale would probably not even be heard; while a slight hiss at 55 dB below the level of a soft piano passage would be annoyingly obvious. Generally, any piece of equipment which generates ambient noise of more than 90 dB below the level of a typical audio signal is noise free as far as most human perception is concerned
1) An undesired disturbance within the frequency band of interest; the summation of unwanted or disturbing energy introduced into a communications system from man-made and natural sources. 2) A disturbance that affects a signal and that may distort the information carried by the signal. 3) Random variations of one or more characteristics of any entity such as voltage, current, or data.
An unwanted signal that interferes with reception of the desired information.
Noise is defined as unwanted sound and is usually measured in dB(A).
n. 1. Any interference that affects the operation of a device. 2. Unwanted electrical signals, produced either naturally or by the circuitry, that degrade the quality or performance of a communications channel. See also distortion.
(Electrical) Describes undesirable energy that may cause false response of sensing system logic or may be falsely recognized as a received signal by a sensor amplifier. Includes EMI and RFI.
Unwanted aberrations and distortion in an electronic signal. Some common types of electronic noise are clock coupling, color flutter, dark current, Johnson noise, among many others.
An unwanted or undesirable signal. See system noise.
Any unwanted signal, usually varying quickly, that is mixed with normal voltage entering a computer; an electrical disturbance that can degrade communications. 9.33, 9.34, 9.35, 12.18
Anything that interferes with the ability to send or receive messages.
Undesirable signals on a communication channel that can interfere with or distort data signals. Go Top
A somewhat arbitrary term that refers to any auditory disturbance that interferes with what a listener wants to hear. [Consider a student doing an impromptu tap dance during math class. To the student who wishes to hear the beat of her shoes, the teacher's voice may be noise. To the teacher, the pupil's tapping is noise
Sound energy in the workplace.
In reference to sound, an unwanted disturbance caused by spurious waves that originate from man-made or natural sources. In radar, erratic or random deflection or intensity of the indicator sweep that tends to mask small echo signals.
Undesirable communications channel signals.
1. Any undesired sound. By extension, noise is any unwanted disturbance within a useful frequency band, such as undesired electric waves in a transmission channel or device. When caused by natural electrical discharges in the atmosphere, noise may be called static. 2. An erratic, intermittent, or statistically random oscillation. 3. In electrical circuit analysis, that portion of the unwanted signal which is statistically random, as distinguished from hum, which is an unwanted signal occurring at multiples of the power-supply frequency. If ambiguity exists as to the nature of the noise, a phrase such as acoustic noise or electric noise should be used. Since the above definition are not mutually exclusive, it is usually necessary to depend on context for the distinction. See white noise.
Any interference that affects the operation of a device. In communications, noise consists of random electronic signals, produced either naturally or by the circuitry, that degrade the quality or performance of a communications channel.
The unpredictable or random difference between the observed data and the “true process.
Factors that distort communication between buyer and seller, including barriers to communication.
Electrical or electronic interference with a signal. Any undesired sound or frequency encountered in a signal system.
A random electrical signal on a communications channel that interferes with the desired signal. Noise can be generated by the source itself, or can come from an outside source.
The difference between a model and its predictions. Sometimes data is referred to as noisy when it contains errors such as many missing or incorrect values or when there are extraneous columns.
Meaningless information added to a signal, either by the recording/transmission medium or by an encoding/decoding process. Digital signals are much less susceptible to noise than analog, although compression may still add noise to either.
Any unwanted signal. May include background noise, interference, or transmissions from nodes not belonging to the network. See also SNR (Signal to Noise Ratio).
undesirable or unwanted sound which is introduced to an audio signal by other electronic equipment or excessive gain. Includes hum, hiss, and interference
Any unwanted interference with a transmitted signal. Spurious voltage fluctuations that may be present in the enviroment and cause digital circuits to malfunction.
Random, sporadic, or multi-frequency acoustical signals that is generated by the operation of equipment. Since audible noise can be distracting or annoying to the user, designs try to minimize their levels.
In common use the word noise means unwanted sound or noise pollution. In electronics noise can refer to the electronic signal corresponding to acoustic noise (in an audio system) or the electronic signal corresponding to the (visual) noise commonly seen as 'snow' on a degraded television or video image. In signal processing or computing it can be considered data without meaning; that is, data that is not being used to transmit a signal, but is simply produced as an unwanted by-product of other activities.
Acoustic noise, is any unwanted sound in the acoustic domain, including noise pollution, noise on audio systems, appliance noise, factory noise, crowd noise and so on. It is important to recognise that the term noise is also used to refer to other, non-audible forms, especially in electronics.
Noise in analog video and television is perceived as a random dot pattern that is superimposed on the picture as a result of electronic noise and radiated electromagnetic noise picked up by the receiver's antenna – it is the "snow" that is seen with poor analog television reception or on VHS tapes.
Radio noise in radio reception is the superposition of white noise (also called "static") and other disturbing influences on the signal, caused either by thermal noise and other electronic noise from receiver input circuits or by interference from radiated electromagnetic noise picked up by the receiver's antenna. If no noise was picked up with radio signals, even weak transmissions could be received at virtually any distance by making a radio receiver that was sensitive enough. In practice this doesn't work, and a point is reached where the only way to extend the range of a transmission is to increase the transmitter power.
Noise in audio, recording, and broadcast systems refers to the residual low level sound (usually hiss and hum) that is heard in quiet periods of a programme.
Electronic noise exists in any electronic circuit, as a result of random variations in current or voltage caused by the random movement of the electrons carrying the current as they are jolted around by thermal energy. The lower the temperature the lower is this thermal noise.