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Consumer Electronics by S. P. Bali

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GUN MICROPHONES

The necessity of having a microphone within a short distance of the sound source can in some cases be an inconvenience. In particular, with film and television work, it is essential that the microphone is out of camera range, but there are many other applications where it is not possible to get very near to the source of sound.

 

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Fig. 2.16 (a) A single tube placed in front of a transducer, with a gap between them, directed toward a sound source. Sound travels down the tube to reach the diaphragm at the same time as that passing through the gap from outside. (b) When sound source is off axis, sound passing through the tube takes ...

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