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Home Fundamentals of Acoustics Background-Noise Correction
 
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Background-Noise Correction

In industrial testing, and in other applications, the noise level of a machine or other device must be measured in the presence of background noises. Such noises would, of course, cause an error in the measurement, but these can be corrected very simply.40

The noise meter is placed in the test location, and the measurement is made of the background noise without the machine or device under test in operation. Then a measurement is made in the presence of the background noise with the machine under test operating. The correction to be subtracted from the total noise level is then determined from Fig. 22.

background noise correction for sound or noise-level measurements
Figure 22. Background noise correction for sound or noise-level measurements.


Home Fundamentals of Acoustics Background-Noise Correction

Last Update: 2011-05-13