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This American National standard describes procedures for measuring the performance of noise discriminating and noise canceling microphones. The signal-to-noise ratio is measured at 1/3 octave band intervals with the desired test source in a diffuse noise field. The noise canceling performance of the microphone is defined as the noise canceling index (NCI), a weighted summation of the signal-to-noise ratios. The NCI of the microphone under test can be compared to the required baseline NCI of alaboratory standard pressure microphone.

Product Details

Published:

01/01/2000

ANSI:

ANSI Approved

Number of Pages:

19

File Size:

1 file , 190 KB