Definitions for **"Decibel "**

A reference for the measurement of sound energy. The minimum change in volume that the human ear can perceive. Named after Alexander Graham Bell. A decibel is 1/10th of a Bel.

One tenth part of a Bell. Used to indicate audio levels. Uses a logarithmic scale where 10dB is a difference of 10 times the power. 10 more dB (20dB) makes a difference of 100 times the power, etc. Designed to match the hearing level differences in the human ear.

The standard unit of measuring differences in the expression of relative power or amplitude. One dB is the smallest change in loudness most people can detect. A 1 dB difference is barely noticeable, while 10 dB higher volume will sound twice as loud. Each 3 dB increase in volume level requires roughly double the amplifier power.

Measuring unit for electrical signal accomodated to the human hearing ability.

(dB) - A unit of sound intensity (loudness).

A logarithmic measurement of gain. If G is a system gain (ratio of output to input) then 20 log G = gain in decibels (dB).

A measure of the relative power, or of the relative values of two flux densities, especially of sound intensities and radar power densities. The decibel is derived from the less frequently used unit, the bel, named in honor of Alexander Graham Bell.

In sound, decibels measure a scale from the threshold of human hearing, 0 dB, upward towards the threshold of pain, about 120-140 dB. Because decibels are such a small measure, they are computed logarithmically and cannot be added arithmetically. An increase of ten dB is generally perceived by human ears as a doubling of noise.

A logarithmic measure of the ratio between two powers, voltages, currents, sound intensities, etc. Signal-to-noise ratios are expressed in decibels.

A unit for expressing the intensity (loudness) of sounds.

Used to show a ratio between electrical, acoustical, or other power level.

(deci-Bel) A measurement of power ratio, expressed in "dB." Calculated as 10·log(P1/P2) for power, or 20·log(V1/V2) for voltage ratios.

A unit of measurement for expressing sound pressure level (SPL), signal level and variation or differences in signal level.

The unit of sound pressure used to measure noise. Decibel means 1/10 of a Bell, after Alexander Graham Bell (thus the capital B). Because decibels are such a small measure, they are computed logarithmically and cannot be added arithmetically. An increase of ten dB is perceived by human ears as a doubling of noise.

The logarithmic unit of signal power ratio most commonly used in telephony. It is used to express the relationship between two signal powers, usually between two acoustic, electric, or optical signals.

a unit that measures the intensity of sound; a logarithm of the sound pressure (or power) of a sound to a reference sound pressure (or power), rather than a linear scale.

one tenth of bell (B) : dimensionless unit used in electronics, telecommunication and acoustics to express the ratio of two magnitudes on the common logarithmic scale; if 1 and 2 are the magnitudes of two same kind signals, then the number of decibels, , expressing their ration is

A measurement of sound intensity. It is not an absolute measure, but measures differing levels relative to each other. Can also be used to measure electrical power. It is a logarithmic measure, with an increase of three decibels indicating a doubling of intensity. A difference of 10dB means the sound is ten times the original, whereas a difference of a million times would be just 60dB

Unit of loudness measured on a logarithmic scale. The human ear can perceive 1 dB changes in loudness in the aural range.

This is a ratio and can be used to describe anything. It's often used in music to describe the difference in gain or attenuation of the amplitude of sound. Eg: boosting a signal by 6dB would mean that the signal has been boosted by a ratio of 2:1. It's a logarithmic scale and the ratio can be calculated using dB=20logx where x=ratio.

A measure of sound volume or electrical signal strength. The bigger the number, the more signal (or sound). The smaller (more negative) the number the weaker the signal (like 10dB).

A logarithmic comparison of power levels, defined as ten times the base ten log of the ratio of input power to output power. One tenth of a bel.

One-tenth of a Bel. A ratio of power. Must be referenced to something (as in dBm, dBu, dBV). When used alone (dB), SPL or sound pressure level is being talked about. A power loss of 3dB is half of the original signal. A volume (SPL) loss of 6dB is half of the original signal (even though we as humans percieve a signal halved when it's down 10dB.)

A unit of measurement for audio volume level.

Db - db A unit of power (sound, electrical or optical) increase (amplification) or loss ( attenuation) that is proportional to the exponential increase or decrease in power.

The standard unit for expressing relative power or amplitude levels.

A logarithmic unit that expresses the ratio between a signal and a reference signal. For voltages, dB = 20 log (Vmeasured/Vnominal).

A unit of measuring relative levels of current, voltage or power

(dB) The unit for measuring the relative strength of a signal. One-tenth of a Bel. It is equal to 10 times the logarithm of the power ratio, 20 times the log of the voltage ratio, or 20 times the log of the current ratio. One decibel is the amount by which the pressure of a pure sine wave of sound must be varied in order for the change to be detected by the average human ear.

A logarithmic ratio (base 10) between two quantities denoted as "dB." In terms of energy reflection

Unit for measuring relative strength of a signal parameter such as power or voltage. The number of decibels is 10 times the logarithm (base 10) of the ratio of the power of two signals or the ratio of the power of one signal to a reference level.

Unit for measuring the relative strength of ight signals. Normally expressed in dB, it is equal to one-tenth the common logarithm of the ratio of two levels. Expressed in dBm when a power level is compared to a milliwatt.

The unit of measure for the logarithmic ratio of two signal intensities or power levels. If the measurement conditions are the same, the decibel value can be expressed by the logarithmic ratio of the signal amplitudes. For example, a ratio of 1/10 = 20 * log (1/10) = -20 dB

A relative comparison of two signal amplitudes in a manner which roughly corresponds to human sensory response to the signals. In audio work, 0 dB is the threshold of hearing and 120 dB is the threshold of pain. A change of 3 dB doubles or halves the apparent loudness

Decibels (db) are a unit measuring the intensity of noise.

The decibel is a unit of measurement for how "loud" a sound is. In the world of acoustics, decibels are used to measure sound pressure level (SPL) as compared to a reference pressure, but for layman's purposes, "loudness"... read more ... Top definition out of 2. Read all definitions Usefulness: N/A(1 rating) by BuckyF () Rate It! this definition is ... useful somewhat useful incorrect spam / offensive

A unit of loudness, equal to 20 times the common logarithm of the ratio of the pressure produced by a sound wave to a pre-established reference pressure.

A unit to measure the loudness of sound.

a unit for expressing the relative intensity of sounds on a scale from zero for the average least perceptible sound to about 130 for the average pain level. It is commonly abbreviated as: Db

(General) Adopted for convenience in representing vastly different sound pressures. The sound pressure level (SPL) in decibels is 10 times the logarithm to the base 10 of the squared ratio of the sound pressure to a reference pressure of 20 micropascals. This reference pressure is considered the lowest value at 100 Hz that the ear can detect. For every 10 dB increase or decrease in SPL, a sound is generally judged to be about twice or half as loud as before the change.

A logarithmic scale used to denote the intensity, or pressure level, of a sound relative to the threshold of human hearing. A step of 10 dB is a ten-fold increase in intensity or sound energy and actually sounds a little more than twice as loud. The quietest sound we can hear is 0 dB; a soft whisper has about 100 times more sound energy and so is about 20 dB. A power lawn-mower has a factor of 109 more sound energy and is about 90 dB. A rock band may be as high as 110 dB. Above 120 dB the sound produces discomfort and even pain. The scale is often adjusted to take account of the reduced sensitivity of human hearing to high and low frequencies and is then specified as dB(A). On this adjusted scale (the A-weighted scale), the range of human hearing is about 3 to 140 dB(A). For more information see What is a decibel? (How Stuff Works, USA); Typical sound pressure levels (SafetyLine Institute, Western Australia); What is a decibel? (University of New South Wales, Australia); and The decibel scale (schoolscience, UK).

Abbreviated dB, it is a unit of measurement that describes a sound's relative loudness. A 10 decibel increase represents a doubling of the sound level.

1. A unit of level, where: Level in dB = 10 log 10 P1/Pref. P1 = a power, or, quantity directly proportional to power. Pref= a reference power, or, a corresponding reference quantity proportional to power. 2. A measure of magnitude ratio; magnitude ratio is dB = 20 log10 (magnitude ratio).

A unit that expresses differences of power or voltage level. It is used to express power loss in passive circuits or cables.

The standard unit used in the measurement of sound intensity.

A unit for measuring the loudness of a sound.

Decibel (dB) is the unit of measure for volume. Just like percentages, decibels are not absolute, but rather are a relative measure which describes the relationship that two sounds have to one another. For example, if the volume of a sound doubles, it increases by 2 decibels. The human ear has a capacity of around 132 dB. A noise increase of 6 dB is perceived by the human ear as a doubling of the volume. A noise level of around 70 dB is perceived by the human ear as "loud".

The unit used to describe gain or loss of signal power, generally per unit length. Abbreviated dB, the decibel is a ratio of power in vs. power out.

a unit for measuring the relative loudness of sounds (dB)

Abbreviation = dB. A unit for describing the ratio of two powers or intensities, or the ratio of a power to a reference power.

a logarithmic measure used to represent a gain or loss relative to some reference point. The overall gain(loss) of a network may be found by adding or subtracting the gains (losses) of each cascaded stage, this is the benefit of logarithmic measure. dBm represents a power level relative to 1milliwatt.

a LETTER of measurement for relative sound intensity (loudness)

The unit for measuring the relative power of a sound or strength of an electrical signal on a logarithmic scale.

(1) A unit of measure represented as a ratio of two voltages, currents or powers. (2) Measurement of transmission loss or gain.

A decibel is a logarithmic power ratio, abbreviated dB. May also represent a voltage or current ratio if the voltages or currents are measured across (or through) identical impedance. Suffixes to the abbreviation indicate references: dBi, isotropic radiator; dBic, isotropic radiator circular; dBm, milliwatt; dBW, watt.

A ratio of two levels, based upon a logarithmic scale. Often abbreviated as dB.

Unit for measuring sound volume, or sound pressure intensity, sometimes abbreviated to dB.

One tenth of a bel, a unit of measurement common in electronics that quantifies the loudness or strength of a signal.

An exponential measure of sound levels.

A measure of the volume of sound (symb

A logarithmic measure of signal power determined by comparing an initial reference level to a final measurement.

A decibel is a unit for measuring the volume of a sound, equal to the logarithm of the ratio of the intensity of the sound to the intensity of an arbitrarily chosen standard sound.

A relative unit without dimensions calculated as ten times the logarithm to the base 10 of a power ratio or as twenty times the logarithm to the base 10 of a voltage ratio. Note: What is commonly measured as VSWR in the RF world is referred to as return loss and measured in dB in the CATV industry.

(dB) Measures changes in sound pressure. A change of 1dB is just about audible, while +10dB sounds like the level has been doubled.

A logarithmic scale that measures the change in sound pressure or electrical power. A 1dB change is just audible, whereas +10 dB would sound as though the original sound had been doubled in volume.

A representation of ratio between two any values. Annotated as dB. The deciBel ratio of A and B = 20logA/B. deciBels are often used in audio since the human ear responds logarithmically to sound pressure. dB SPL (Sound Pressure Level) is the ratio of a sound pressure (in Pascal units) compared to 20 µPA, the threshold of hearing. Dynamic range is often quoted in dB and represents the ratio between the loudest signal available (amplifier overload level) and the lowest (electrical noise floor).

arithmetic scale used as a measurement of the volume or loudness of sound.

logarithmic measure of gain equal to twenty times the log of the gain.

one-tenth of a bell; a measure of power gain, on a logarithmic scale (e.g. a power level equal to 10 times the common logarithm of the ratio of the output power to the input power). The decibel is a convenient unit for representing a very large range of power gain.

The standard unit for expressing the ratio between powers P1 and P2. dB = 10 log10 P1 / P2, one tenth of a bel.

A decibel is a unit of the loudness of sound.

Unit used to express the intensity of a sound wave in logarithmic rations to the base of ten. Sounds of different frequencies need to be from 0-20 dB in intensity to be heard by normal ears. If more than 20 dB is needed, then further hearing evaluation would be recommended.

One-tenth of a Bel, abbreviated dB. The number of dB is equal to ten times the logarithm of the ratio of two intensities, or 20 times the logarithm of the ratio of two amplitudes or pressures

a logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity

a basic unit of sound pressure level

a division of a logarithmic scale for expressing the ratio of two quantities proportional to power or energy

a logarithm formula, if you remember that fact you will be much less confused in the future

a logarithmic (dimension-less) unit of measure often used in describing the amplitude of sound

a logarithmic - measurement that reflects the tremendous range of sound intensity our ears can perceive and closely correlates to the physiology of our ears and our perception of loudness

a logarithmic representation of a ratio of two quantities

a logarithmic unit measuring the ratio of o/p power to I/p power

a logarithmic unit of amplitude measurement

a logarithmic unit representing the ratio between the powers of two signals

a logarithmic unit that is a ratio between a reference level and a measured level

a mathematically calculated value comparing a specific sound pressure with a reference pressure that represents the lowest value the ear can detect

a measurement of sound while a calorie is a measurement of heat

a measurement used to compare the ratio of intensities of two acoustic sounds (or electronic signal)

a measure of intensity of sound, and to understand how loud Mark's snoring is, consider that normal human speech is usually in

an expression of the ratio of power between two signals

a reference to the lowest sound level that can be recorded

a RELATIONSHIP between two values of POWER

a relative measurement derived by comparing a measured level against a known reference

a scientific unit that measures the intensity of sounds

a unit for describing the amplitude of sound

a unit used for measuring the strength of a signal

A measure of power relative to something else.

Decibel, a unit of measurement used to describe acoustical power and sound-pressure levels.

A mathematical ratio that indicates the relative strength of a device's electric or acoustic signal to that of another. It can be used by itself but is often paired with a specific unit of measure, such as a milliwatt (dBm) or an isotropic antenna (dBi). The higher a device's decibel rating, the more powerful its signal is.

A unit of measurement used to compare power levels.

A unit for a logarithmic ratio, commonly used as a measure of the ratio of two powers.

the unit that is used to measure sound.

Unit of level when the base of the logarithm is the 10th root of 10 and the quantities concerned are proportional to power (ANSI S1.1-1994: decibel).

A dimensionless unit for expressing the ratio of two powers, or more usually voltages or currents, on a loge=arithmic scale. If A and B represents two voltages or currents the ratio A/B corresponds to 20 log A/B decibels. One decibel represents a ratio of approximately 1.1 to1 between A and B

The standard unit for measuring sound. A subjective scale where one unit equals one increment of “loudness.

The primary unit of sound measurement; used to quantify both sound pressure level and sound power level. In acoustics, equal to ten times the logarithm of the ratio of one sound and a lower-intensity reference sound. One decibel indicates a difference of about 26% and is about the smallest change the ear can detect. The dB level is a logarithm quantity; the maximum normal level is approximately 120dB.

Sound level in Bels as a logarithmic ration. Sound intensity described in decibels. For example: breathing, 5 dB; office activity 50 dB; jet aircraft during takeoff at a distance of 300 feet, 130 dB.

A unit measuring the relative strength of sound or electrical power. The unit is useful to relate changes in loudness to changes in electrical power and vice versa. One decibel is the faintest audible sound. With respect to electrical power, it is generally used in measuring the loss or gain of power in a device or channel. One milliwatt is usually the electrical reference point for 0 decibels.

measurement of the volume or loudness of a sound.

A measure of relative amplitude of a sine wave.

A logarithmic representation of magnitude relationships commonly used in radio and sound measurement.

A unit of measurement of optical power which indicates relative power on a logarithmic scale, sometimes called dBr. dB=10 log ( power ratio)

A unit used of measure for vibration amplitude. Term found in About the Voice: Acoustics 101.

A dimensionless expression of the ratio of two values of some variable in a vibratory system. For example, in random vibration the ratio of the power spectral density at two frequencies is given as

One tenth of a Bel (B). The abbreviation for decibel is "dB." If N = P1/P2 is the ratio of two powers, then this ratio, N, expressed in decibels, is N = 10 log10(P1/P2).

A unit of measurement indicating loudness, based on a logarithmic scale. Sound scales are based on either sound pressure level (dB SPL) or hearing level (dB HL). Back to the Audiology Clinic main page

The measure of sound loudness.. One dB is considered to be the smallest change in sound loudness that is perceptible to the human ear.

A unit of noise level representing a relative quantity. This reference value is a sound pressure of 20 micrometers per square meter.

A unit that expresses the relative difference in power, usually between acoustic or electromagnetic signals. One dB equals ten times the common logarithm of the ratio of incident and transmitted power; or twenty times the common logarithm of the ratio of incident and transmitted field strength.

The unit used to measure the intensity or loudness of sound.

A number used to express relative output sensitivity. It is a logarithmic ratio.

The loudness of a sound. Usually denoted as "db." A human voice is typically 70 db.

A unit of sound measurement. Sound doubles in loudness for every 10 decibels.

Describes the relative loudness of a sound.

A handy way of expressing the ratio of one signal to another. dB is calculated by 10 * log10(P2/P1), where P2, P1 are power levels. Voltage ratios in dB are calculated by 20 * log10(V2/V1).

Unit of measure for loudness, volume or intensity of sound. Noises at or above 85 decibels are potentially harmful to human hearing.

A dimensionless unit which denotes the ratio between two quantities that are proportional to power, energy or intensity. One of these quantities is a designated reference by which all other quantities of identical units are divided. The sound pressure level in decibels is equal to 10 times the logarithm (to the base 10) of the ratio between the pressure squared divided by the reference pressure squared. The reference pressure used in acoustics is 20 microPascals.

Abbreviation dB. A logarithmic function used to simplify MATV calculations. Decibels may be added or subtracted. 0 dB is the standard reference level for all MATV calculations.

A measure of the ratio between two signal levels; used to express gain (or loss) in a system.

unit that measures the intensity or loudness of sound.

A standard logarithmic unit for the ratio of two powers, voltages, or currents. In fiber optics, the ratio is power.

(dB) Volume is a scale of relative loudness. A difference of approx. 1 dB is the minimum perceptible change in volume, 3 dB is a moderate change in volume, and about 10 dB is an apparent doubling of volume. Lowest Threshold of Hearing 0 dB, Whisper 15-25 dB, Normal Speaking Voice 65-70, dB Live Rock Music 120-dB+ Pain threshold of hearing 130 dB, Jet Aircraft 140-180 dB.

One-tenth of a Bel. Named in part after Alexander Graham Bell (hence the capital B), the decibel is used in both audio and video applications (although more often the latter) to compare power differences in voltage, current, watts, sound pressure levels (SPL), etc. The number of Bels is the common logarithm of the ratio of two powers. If two powers differ by 1 Bel, the greater one will be 10 times the other. A 100-watt amplifier is 1 Bel, or 10 dB, higher in output than a 10-watt unit. Decibels are ratios, not fixed quantities. The logarithmic nature of the decibel scale corresponds to the logarithmic nature of human hearing. One dB SPL is commonly accepted as the smallest difference that people can hear, depending on the bandwidth of the manipulated signal. When measuring audio signal-to-noise ratios, the difference between the quietest and loudest sounds is stated in dB.

A unit of relative measure used to compare levels of sound intensity.

A logarithmic unit used for expressing the ratio of two powers.

Logarithmic measurement of signal strength. 1/10 of a Bel.

A logarithmic measurement unit that describes a sound's relative loudness, though it can also be used to describe the relative difference between two power levels. A decibel is one tenth of a Bel. In sound, decibels generally measure a scale from 0 (the threshold of hearing) to 120-140 dB (the threshold of pain). A 3dB difference equates to a doubling of power. A 10dB difference is required to double the subjective volume. A 1dB difference over a broad frequency range is noticeable to most people, while a 0.2dB difference can affect the subjective impression of a sound.

1) Relative measurement for the volume (loudness) of sound. Also used to measure the difference between two voltages, or two currents. See Zero dB. 2) A numerical expression of the relative loudness of a sound. The difference in decibels between two sounds is ten times the common logarithm of the ratio of their power levels.

A unit used to express the relative difference in power, usually between acoustic or electrical signals, equal to ten times the common logarithm of the ratio of the two levels.

A unit for measuring the volume of a sound, equal to 20 times (the logarithm to the base 10 of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals (20 micronewtons per square meter).

A dB is a unit of measurement for ratios of sound level, power, voltage, and other quantities. For example, a stereo system that can reach a level of 130 dB is 130dB louder than the threshold of hearing (0dB). 130dB is 10,000,000 times louder than the quietest sound the typical human ear can perceive

A unit expressing the ratio of two voltages, currents or powers. It is equal to 20 times the common logarithm of the ratio of two voltages across or two currents through equal loads, or 10 times the common logarithm of the two powers. One decibel is approximately the smallest change in audible power that can be recognized by the human ear.

A measurement of sound intensity. The decibel scale generally goes from zero (the faintest noise a person can hear) up to about 130 (which is the average pain level).

A logarithmic measure of the intensity or loudness of sound. Is commonly expressed as dB.

a logarithmic unit for measuring relative strength of a signal

(db) Measures strength of sound waves. A change of 1db marks an audible increase, where an increase of 10db effectively doubles the volume.

one tenth of a bel, the unit of measure expressing the relative intensity of a sound. The results of a hearing test are often expressed in decibels.

A measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. While originally only used for power and intensity ratios, it has come to be used more generally in engineering. The decibel is widely used as a measure of the loudness of sound.

Unit of measurement using a logarithmic scale to represent ratios of two values, A and B, calculated as log10(A/B).

The unit of measure used to indicate relative changes in signal intensity or sound volume. The actual expression for calculating the difference in decibels between signal A and signal B is: decibel (dB) = 20·logbase10 (signal A amplitude/signal B amplitude) +6 dB represents a doubling of the signal or a 100% increase+5 dB represents a 78% increase+4 dB represents a 58% increase+3 dB represents a 41% increase+2 dB represents a 26% increase+1 dB represents a 12% increase+0 dB represents no change-signals are equal-1 dB represents a 11% decrease-2 dB represents a 21% decrease-3 dB represents a 29% decrease-4 dB represents a 37% decrease-5 dB represents a 44% decrease-6 dB represents a halving of the signal or a 50% decrease

A unit used to express the ratio between two amounts of power P1 and P2 existing at two points. By definition:dB = 10 LOG10 ( P1 / P2 ). It can also be used to express voltage and current ratios but only when the voltage or current is measured at places having identical impedance.

the unit of sound pressure, giving a measure of the noise intensity; dB in short

The unit of measure for sound pressure level (volume).

A unit measuring how loud a sound is.

a measurement unit of sound intensity or pressure

a logarithmic measure of loudness. Two people talking produce approximately 6OdB. A jumbo jet taking off approximately 135dB.

Unit of measurement for sound levels.

Unit of measurement (dB) commonly used to measure the strength of an acoustic signal.

Numeric expression of the loudness of sound.

A unit to express differences of power level. A term that expresses two power levels used to indicate gains or losses in a system.

Sound energy is measured in units called decibels. The decibel scale does not increase or decrease using standard arithmetic. For example, reducing a noise level by 3 dB actually means the sound energy has been cut in half. For example, a noise level of 65 dB has half as much sound energy as a noise measuring 68 dB.

A unit for measuring the relative intensity of sounds, equal to 1/10 of a bel. The decibel scale used for this measurement is logarithmic, with every 3-dB increase indicating a doubling of noise intensity. The term dBA is the dB sound pressure level filtered through an A filtering network to approximate human hearing response at low frequencies. The decibel is also used to describe levels of sound power and is the logarithm of sound power level. A two-fold increase in the power output of a source will result in a 3-dB increase in power level and correspondingly a 3-dB increase in sound power level at any distance from the source. Sound power level will be reduced 6 dB for every doubling of distance from a source.

Unit of measure for loudness. More technically, a decibel describes the degree of energy in a sound wave. Quiet conversation is at a level of about 40 decibels, while planes on the runway measure about 120 dB. Ideally, the sound level of the classroom would not exceed 35 dB.

A unit of measurement used to indicate audio power level. Technically, a decibel is a logarithmic ratio of two numbers, which means that there is no such thing as a dB measurement of a single signal. In order to measure a signal in dB, you need to know what level it is referenced to. Commonly used reference levels are indicated by such symbols as dBm, dBV, and dBu.

A unit of measurement of the intensity of sound (perceived as the loudness of the sound). Abbreviated dB.

A logarithmic measure of sound intensity. It is equal to 10 times the common logarithm of the ratio of sound intensity to a reference intensity. A rating...

A unit of measurement expressing ratios using logarithmic scales related to human aural or visual perception. Many different measurements are based on a reference point of 0 dB; for example a standard level of sound or power.

(Abbreviated dB) The unit of measurement used to describe a signal level or volume level. This is a logarithmic scale so an increase of 3dB is double the level. (3dB=2 times, 6dB=4 times, 9dB=8 times, etc.) Equal to one-tenth of a Bel.

A unit to express differences of power level. Used to express power gain in amplifiers or power loss in passive circuits or cables.

A unit for comparing two currents, voltages or power levels based on a logarithmic scale. It is used particularly for expressing the difference between very large and very small values (expression: R = 10*log10(r), where r is the linear ratio and R is the ratio in dB).

The standard unit for expressing relative power levels. Decibels indicate the ratio of power output to power input: dB = 10Log10(P1/P2).

A measure of the intensity of a sound in terms of the air-pressure change caused by a sound wave.

One-tenth of a bel; the unit of comparison between electric powers, voltages, or currents.

(1) A logarithmic scale used to denote a change in the relative strength of an electric signal or acoustic wave. It is a standard unit for expressing the ratio between power and power level. An increase of +3dB is a doubling of electrical (or signal) power; an increase of +10dB is a doubling of perceived loudness. The decibel is not an absolute measurement, but indicates the relationship or ratio between two signal levels. (2) SPL (sound pressure level) can be measured in dB.

A unit of power output (acoustical or electrical), for example, power gain in amplifiers or power loss in cables.

A unit of measurement for the ratio of loudness. The threshold of hearing is 0 dB. One dB SPL is the smallest audible difference in sound level.

A logarithmic unit used to measure sound intensity or power gain.

A logarithmic scale that measures the loudness of sound. It takes 50% more power to achieve a 3 dB increase, and a 10 decibel increase represents in a perceived doubling of sound level.

A measure of sound intensity. A change of 10 decibels corresponds to a change in sound power of 10 times; 20 decibels, a change of 100 times; and so forth.

this is simply a measure of sound intensity. When you are at the Smashing Pumpkins concert, standing next to the speakers, banging your head, the volume of the music is measured in decibels. The higher the decibels, the louder the music and the higher the decibel level, the more likely it is to cause damage to your auditory system.... What did you say

A logarithmic unit for expressing power relationships. = 10 log10( 2) where is the difference of decibels of intensities 1 & 2.

A ratio measuring the loudness of sounds.

A means of measuring amplitude.

The unit to measure the difference between two levels of a sound or electrical signal. A logarithmic expression of the ratio of two such levels. An increase of 10dB represents a tenfold increase in power. Doubling power raises SPL by about 3 dB.

A standardized measurement of audio output level. Almost all audio meters on digital video equipment calibrate and measure digital audio signal in decibels with the maximum safe ceiling being 0 dB. Decibel is most commonly abbreviated to dB. The decibel scale is an exponential scale, so as you move up the decibel scale, the output levels increase disproportionately.

A decibel is a unit for expressing the relative loudness of a sound. One-tenth of a bel, the decibel is a designation of a unit of intensity on a logarithmic (non-linear) scale.

The units of sound level and noise exposure measurement

A unit used to measure the intensity of sound.

The standard unit of expressing the loss or gain of electrical power in a circuit.

a unit of measure applied to both sound and electrical signals, based on a logarithmic scale. Also referred to as "db's."

(dB) Measure of audio signal strength based on a logarithmic scale measured in volts. Also the unit of measure used for sound pressure level.

a unit of measure used to logarithmically express ratios of change in power or signal levels. Equal to one-tenth of a Bel (named for Alexander Graham Bell).

Unit used for the measuring the relative loudness of sounds. One decibel is equal the approximate difference of loudness ordinarily detectable by the human ear, the range of which is about 130 decibels on a scale beginning at one, for the faintest audible sound

A measure of loudness (abbr: dB). The decibel scale is such that 3dB represents a doubling of amplifier power from say 50W to 100W), while 10dB represents a doubling of perceived loudness.

Not a unit like inches, but a ratio-like percent, the Bel and the decibel define power differences. (One decibel is one tenth of a Bel.) One dB is a difference of 27%. A 3-dB difference is a difference of two times, or 100%; that's why a 200-watt amplifier is only 3 dB more powerful than a 100-watt amp. A power difference of 1,000% is a 10-dB difference. A 60-dB difference is a difference of 1 million times, and so on. The decibel is used to compare power differences in voltage, current, watts, sound pressure, etc. One dB SPL is commonly accepted as the smallest difference that people can hear. The logarithmic nature of the decibel scale corresponds to the logarithmic nature of human hearing.

Named after Alexander Graham Bell. We perceive differences in volume level in a logarithmic manner. Our ears become less sensitive to sound as its intensity increases. Decibels are a logarithmic scale of relative loudness. A difference of about 1 dB is the minimum perceptible change in volume, 3 dB is a moderate change in volume, and about 10 dB is an apparent doubling of volume. 0 dB is the threshold of hearing and 130 dB is the threshold of pain.

The decibel is a ratio of two numbers, equal to the tenth root of ten or about 1.259. It is mostly used as the ratio of two power levels. If a radio receiver, playing at a certain "volume" level. is turned up until the acoustic power output has increased by 25.9%, its new level is one decibel above the original level.

Unit of measure of sound pressure.

Logarithmic measure of relative power levels.

A unit indicating a ratio between two values (voltages, currents or powers). The number of bels is defined as the common logarithm of the ratio of two powers. Two to three decibels is usually the smallest change in sound level that can be detected by the human ear. The bel is named after Alexander Graham Bell.

A unit (dB) for measuring the relative strength of signal power. The number of decibels equals ten times the logarithm (base 10) of the ratio of the measured signal power to a reference power. One tenth of a bell.

a decibel (or dB ) is 1/10th of a bel, which is a relative measure of two sounds.

A tenth of a bel; a unit on a logarithmic scale for measuring the relative strength of a signal, such as its power or voltage; a unit expressing the relative intensity of sounds.

(dB) A unit of measurement of sound that compares the relative intensity of different sound sources.

The decibel is a logarithmic scale. In the context of CCTV it refers to voltage or signal strength. A 6db increase is equivalent to doubling the signal strength.

A customary logarithmic measure most commonly used (in various ways) for measuring sound. The human ear is capable of detecting an enormous range of sound intensities. Furthermore, our perception is not linear. Experiment shows that when humans perceive one sound to be twice as loud as another, in fact the louder sound is about ten times as intense as the fainter one. For this reason, sound is measured on logarithmic scales. Informally, if one sound is 1 bel (10 decibels) "louder" than another, this means the louder sound is 10 times louder than the fainter one. A difference of 20 decibels corresponds to an increase of 10 x 10 or 100 times in intensity. The beginning of the scale, 0 decibels, can be set in different ways, depending on exactly which aspect of sound is being measured. See also dB- (above)

The unit of measurement for the loudness of a sound. The higher the dB, the louder the sound and the worse the hearing loss.

Sound level in decibels as a logarithmic ratio. Sound intensity described in decibels. i.e.: Breathing 5 dB, office activity 50 dB, Jet Aircraft during takeoff at 300' distance 130 dB. (See submenu TABLES under Acoustics for a table on Sound Source of Environment).

The standard unit to measure amplitude. With sound waves, decibels measure loudness.

1/10 of a Bel. In audio terms it is the measurement of the amount of perceived volume change. One decibel is the smallest amount of volume change that is perceived by an average listener. It can be either a gain or a loss of amplitude.

(dBA)- A measure of the pressure associated with noise. Refer to the section on noise management in the Managing your impacts chapter. Department of Environmental Protection (DEP) â€“ service department of the EPA and carry out a variety of functions under the EPA. Some examples of these functions include environmental impact assessments and preparation of draft reports, research and coordination functions in relation to the environment, pollution prevention and management, and the preparation of draft policies.

Unit to express differences of power level. It is used to express power loss in cables.

A decibel is one-tenth of a bel and is equal to 10 times the logarithm of the power ratio, 20 times the log of the voltage ratio, or 20 times the log of the current ratio. Decibels are also used to express acoustic power, such as the apparent level of a sound. The decibel can express an actual level only when comparing with some definite reference level that is assumed to be zero dB.

unit for expressing a logarithmic measure of the ratio of two signal levels. It is most commonly used for expressing power, voltage and current ratios as follows: Power Ratio dB = 10 log (P1/P2), Voltage Ratio dB = 20 log (V1/V2), Current Ratio dB = 20 log (I1/I2). dBW = decibels (power level) referenced to 1 watt. dBm = decibels (power level) referenced to 1 milli watt; often used across 50 ohm input for receivers. dBV = decibels (voltage level) referenced to 1 volt across 50 ohms. dBuV = decibels (voltage level) referenced to 1 microvolt across 50 ohms. dBuV/m = decibels (voltage level) referenced to 1 microvolt per meter.

A measure of sound volume or intensity; the smallest noticeable sound intensity difference detectable under laboratory conditions.

(dB) a logarithmic representation of gain or loss.

The unit of sound measurement. O dB is taken to be the threshold of hearing, while 130 dB is the threshold of pain. A normal speaking voice is about 65-70 dB.

A unit for measuring the relative power ratios and transmission gains or losses. Units are expressed in terms of the logarithm to base 10 of a ratio (usually in watts) when comparing an input signal to an output signal. The formula is dB = 10 x log10 (P1/P2). Note that a dB value is not absolute, but rather a measure for the relationship between two power or signal levels.

A unit used to convey the intensity of sound.

A unit used to measure relative increase or decrease in power, voltage or current, using a logarithmic scale.

The standard unit used to express the ratio of two power levels. It is used in communications to express either a gain or loss in power between the input and output devices.

A unit of measurement referring to sound intensity that is equal to one tenth of a Bel.

(dB) A ratio measuring an audio signals strength based on a logarithmic scale.

A unit of measure used to express relative difference in power or intensity of sound.

a unit that measures the "loudness" of sound on a scale from zero (a sound that most people can just barely hear) to about 130 or more for sounds that cause pain

A measure of the sound volume intensity. The measurement is logarithmic, and 7 is 10 times louder than 6.

Ratio between two like quantities. Typically applied to for power measurements, but can be also used for voltage & current comparison measurements.

A measure of the power ratio of two signals. It is equal to ten times the logarithm of the ratio of the two signals.

The unit used to measure the volume of a sound.

A measurement of sound energy or sound pressure. The decibel scale is logarithmic. A 10-decibel increase in sound is equal to a tenfold increase in sound energy.

Unit for reporting level (magnitude) of sound. A change of 10 decibels is generally considered a doubling or a halving of the perceived loudness of a sound.

The power or voltage ratio of two signals.

Unit of measurement, abbreviated dB, indicating the relative strength of light signals.

A logarithmic function used to simplify CTN calculations. Decibels may be added or subtracted. 0 dB is the standard reference level for all CTN calculations. The logarithimic ratio of power levels used to indicate gains or losses of signals. Decibels relative to one watt, milliwatt and millivolt are abbreviated as dBm V is used as the standard reference for all SMATV calculations.

A unit of measure of the intensity of sound. A decibel is one tenth of a bel; an increase of 1 bel is approximately double the loudness of a sound.

A logarithmic comparison of power levels (optical or electrical) voltages and currents.

a unit of measurement for sound, it measures the loudness or volume of the sound waves.

A logarithmic unit of measure often used as the scale for sound pressure levels (SPL). This is perceived as "loudness or intensity".

The unit of measurement for the loudness of a sound. The higher the d13 level presented, the louder the sound. In describing a hearing loss, the higher the dB level indicated, the more severe the hearing loss.

A unit of measure used to express differences of power. Decibels are also used to express acoustic power, such as the level of sound. They are also used to express the power loss in passive circuits or cables.

(db) - Unit of measure for comparing sound levels or electronic signal levels.

The term decibel (dB) means one-tenth of a Bel-named after Alexander Graham Bell. (This is why the B in dB is capitalized). A Bel is the base 10 logarithm of the ratio between the power level of two sounds or signals.

Unit of measurement for loudness of a sound; the louder the sound, the greater the number of decibels.

dB -- A unit of measurement for electrical signals which operates on a logarithmic scale. Never an absolute value, always a ratio.

A measure of the gain of an antenna.

Measurement used for intensity (loudness) of sounds.

A unit used to express the change in amplitude or the level of sound. As a unit, it is written as dB. Decibels are calculated as 20log (V1/V2) for voltage (current) signals, and as 10log (V1/V2) for other signals.

A unit for expressing the relative intensity of sounds on a scale from zero for the average least perceptible sound to about 130 for the average level at which sound causes pain to humans.

A unit of power measurement. A 6 dB rise in signal strength represents a 100-percent increase (or doubling) in power.

The unit of logarithmic expression of a ratio, such as a power ratio or a voltage ratio. A representation of gain, given as 10 times the common logarithm of the gain raio.

The logarithmic ratio between some known reference and some quantity of electrical or acoustic signal power.

The unit that expresses the logarithmic ratio of two power or voltage levels. Useful in defining the amount of signal level, noise, distortion and other parameters in a cable system.

Used as a measure of power level on a logarithmic scale, usually base 10. Three db is equal to two times value and ten db is equal to ten times value. A measure of voltage or current level, respectively, on a logarithmic scale, usually base 10. 3 dB is equal to 1.41 times value and 10 dB is equal to 3 times value. In fiber optics, the standard unit used to express gain or loss of optical power.

A unit to measure the relative levels of current, voltage or power.

a measure of sound pressure, which determines loudness. The abbreviation, "dB", is often followed by an "A", "B", or "C" to indicate the method used to weight sound frequencies when measuring sound pressure levels.

The standard unit used to express transmission gain or loss and relative power levels. Also called dB.

Decibels (abbreviated dB) are the unit of measuring the loudness (or intensity) of sounds. 0 dB is the faintest audible sound. Blue whale calls are up to 188 dB; this is the loudest animal sound, and is painful to the human ear. The decibel scale is logarithmic.

The standard unit used to express the ratio of two power levels. In communications it is used to represent either the gain or loss of power between the input and output devices.

Unit of sound pressure or power. Abbreviation is "dB". 1 Watt of sound power is equal to 120 dB.

A logrithmic measure of the ratio between two quantities. Symbol dB.

A unit measurement of the intensity of a sound wave.

A unit of measurement which expresses the ratio of two power levels on a logarithmic scale. It is used in cable systems to specify losses, k gains, and other ratios of power. The decibel is one-tenth of a Bel.

unit of measuring the intensity or loudness of sound.

A mathematical conversion, utilizing logarithms of a ratio, which is used as a unit of measure for RF signals. It is primarily used a measure of the (power) gain and (insertion) loss of RF components.

Unit for measuring the ration amounts of acoustical power; one-tenth of a bel.

A measurement of sound pressure, or relative intensity of sound. It should be noted that decibels are logarithmic in nature. An increase of 10dB from a certain point represents a doubling of sound output. From an audio standpoint, doubling the sound output of a system will require 10 times the power.

a measure of noise level; sound intensity

(dB): A unit of measurement indicating relative power on a logarithmic scale. Often expressed in reference to a fixed value, such as dBm or dBµ .

A logorithmic unit for measuring the volume of sound, which is the square of the amplitude of sound waves.

The decibel (dB) is an expression of the relationship between a variable quantity and a known reference quantity. There are two different, related, usage dependent, formulas used to calculate decibels and this duality can cause problems for those who do not understand the two different applications and their relation. Since decibels express a relationship between a variable and a known reference, they are useful for a wide variety of measurements in acoustics, physics, electronics and other disciplines.

Decibel is a realtime communication framework based on Telepathy. It is meant to integrate VoIP, text chat, CTI , and similar applications into the user's desktop. Decibel consists of a desktop neutral policy daemon called Houston and desktop specific components for user interaction.

Decibel is a new communication framework for KDE4, the next major release of the K Desktop Environment. Decibel aims to integrate all communication protocols into the desktop. As of now they have all their contacts in different applications: AOL, MSN, E-mail, Skype, etc.

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