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Consumer Electronics by S. P. Bali

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STEREO PICKUP TECHNIQUES

The most general type of stereo pickup technique is called time-intensity pickup. This means that the signals in the two stereo channels will vary in both intensity and time according to the difference in direction and in distance of the sound source from the two microphones.

The stereo effect can be obtained by picking up the sound with two microphones spaced a certain distance apart and located in front of the sound source. If they are too close the stereo effect is lost. Experiments have led to the conclusion that there is a definite optimum relation between the microphones separation and their distance from the source. A similar relation exists between the listeners' speakers and their distance from him. This is illustrated ...

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