This term refer to a way of connecting audio between VTRs using 3-pin XLR connectors. Using Balanced Audio reduces noise pick up introduced through interference.
A wiring technique which results in the reduction of noise generated in cable runs. Two identical audio signals feferenced to each other are carried 180 degrees out-of-phase (in opposite polarity) on two leads. At the front end of the preamplifier, the signals are turned in phase and summed, turning any noise propagated in the cable 180 degrees out of phase and cancelling it.
A wiring method using three individual wires for a single audio signal. One wire is a ground/drain/shield wire, another carries a positive audio signal, the third carries a negative audio signal. The two audio signal wires carry the same (equal) signal, but the signals are oposite polarity of each other. At the terminating end, the two signals are inversely combined (one of the signals is inverted and then the two signals are summed). Why do this? Electromagnetic interference is inducd equally on both wires--this would normally result in a noisy audio signal. Since one of the signals is opposite polarity (and is reversed when the two are summed together), the interference now cancels out because if two signals are equal but opposite in polarity, they will cancel when summed together. Balanced lines are used for microphone and line level signals. see also unbalanced
1) Adjusting the left and right channel program material in a stereo sound system to achieve an equal mix of both channels. 2) A three-wire cabling or interconnection system that uses a separate ground wire and two signal conductors with opposite polarity. Commonly used in professional sound applications for its immunity to induced noise and electromagnetic interference. (See XLR connector).
study trial in which a particular type of subject is equally represented in each study group
There are a couple of different kinds of balancing performed by DPB staff when developing the Commonwealth's budget. In Web BEARS, balancing usually refers to total fund amounts for each program being equal the total subobject amounts for that program. For addenda submissions this fund / subobject balance must exist for each program within each addenda. See the Understanding Budget Submission chapter for a more detail explanation.
When positive and negative signal wires have a separate earthed (grounded) shield around them to improve interference rejection. Unbalanced connections use a coaxial cable with a single core and the outer shield doubles as the signal return path. are less apt to pick up external noise.
An experimental design has equal numbers of observations or replications at each possible combination of level s of the factor
A method of audio connection that ‘balances’ the signal between two wires and a screen that carries no signal.
A method of audio connection which ‘balances' the signal between two wires and a screen which carries no signal. Any interference is picked up equally by the two wires, through common mode rejection at the destination differential balanced input resulting in cancellation of the interference signal. For balancing to be effective, both the sending and receiving device must have balanced output and input stages respectively. See also: Guide to Balanced and Unbalanced signals.
Refers to fertilizer that has equal proportions of nitrogen, phosphorous and potassium, such as 10-10-10 or 20-20-20.
total debits and credits are equal; "the books looked balanced"
Balanced audio signals utilize two signal-carrying wires and a shield, as opposed to the standard unbalanced configuration that employs the shield as one of the signal carriers. It is often used in professional situations and high-end equipment because it is much less likely to pick up external electronic noises, such as hum, static, or radio interference.
A method for interconnecting electrical signals using a shielded twisted-pair cable. The signal is transmitted along two wires, with one copy of the signal inverted. The system relies on noise being induced equally (and in the same phase or polarity) on each wire. Balanced designs have equal impedance from each line relative to ground, guaranteeing equal noise susceptibility. Since a balanced input stage amplifies only the difference between the lines, it rejects everything else - the noise.
Balanced microphone output carries a signal on each of two conductors (the signals are of opposite polarity). Because noise that comes through a balanced cable is similar in each conductor, and balanced input recognizes only differences between these two signals, balanced microphones and cables tend to allow less noise and hum.
A circuit that carries information by means of two equal but opposite polarity signals, on two conductors.
1) Having a pleasing amount of low frequencies compared to mid-range frequencies and high frequencies. 2) Having a pleasing mixture of the various instrument levels in an audio recording. 3) Having a fairly equal level in each of the stereo channels. 4) A method of interconnecting electronic gear using three-conductor cables.
A balanced signal is carried by a balanced cable. Balanced cables consist of two wires wrapped around each other that both carry the output signal but in opposite phases. Usually there is a third wire that surrounds the other two and acts as a shield. Should the cable pick up any extra noise along the way (hum, radio stations, buzz, etc.) it will be cancelled when the balanced signal is received by a system device with balanced inputs that corrects the phases. This restores the phase of the original signal but puts the extra noise into opposite phases, thus cancellation. Usually balanced devices use XLR type connectors or TRS 1/4" connectors (stereo phone jack). You must always read the manuals for your system devices to know if they operate with balanced signals because the connector type doesn't really determine if it is balanced or unbalanced.
LOAD An alternating current power system consisting of more than two current-carrying conductors in which these conductors all carry the same current.
Input - A differential input circuit pair with equal impedance to ground on each side. See Differential Input. The advantages as opposed to single-ended transmission are noise rejection over long distances of cabling.
Referring to wiring: Audio signals require two wires. In an unbalanced line the shield is one of those wires. In a balanced line, there are two wires plus the shield. For the system to be balanced requires balanced electronics and usually employs XLR connectors. Balanced lines are less apt to pick up external noise. This is usually not a factor in home audio, but is a factor in professional audio requiring hundreds or even thousands of feet of cabling. Many higher quality home audio cables terminated with RCA jacks are balanced designs using two conductors and a shield instead of one conductor plus shield.
In a balanced electrical circuit the positive and negative conducting paths are referenced to earth equally. The advantages of balanced operation are improved signal to noise ratio and distortion compared with unbalanced circuits.
In audio, a signal utilizing two conductors, generally referred to as positive and negative, in addition to a shield (or ground). The main advantage of a balanced signal is that noise introduced into the line is common to both the positive and negative conductors, and arrives at its destination out of phase, where it effectively cancels itself. See also, "Unbalanced.
A term describing a transmission line or cable consisting of three conductors, two ungrounded signal conductors (pin 2 “hot” & pin 3 “cold”) whose voltages are opposite in polarity but equal in magnitude with respect to ground (pin 1). Along the length of any cable, noise may be introduced from external sources such as power cables, RF interference, etc. This noise will be identical on both the hot and cold signal conductors. This is known as a common mode signal - a signal which appears equally on both conductors of a two wire line. So the “hot” and “cold” conductors carry two signals: A desirable audio signal which has an opposite polarity voltage on each line and unwanted noise which is the same polarity on both lines. This is where the trick of balanced audio kicks in. At the input stage when the inverted audio signal is re-inverted to make both desirable audio signals the same, the noise is also inverted (i.e., put out of phase). Viola... the unwanted noise is cancelled out, leaving only the original signal.
A transmission line in which voltages on the two conductors are equal in magnitude, but opposite in polarity, with respect to ground.
an equal balance of flavors.
an audio circuit with two shielded conductors running at reverse polarity and equal at ground. Balanced wiring provides noise-free transfer of audio in areas susceptible to noise, like recording studios and live sound venues. Requires balanced I/O and balanced cables