Four identical compressors are tested in an anechoic chamber with some background noise. A sound pressure level (SPL) meter is placed at a fixed location in the chamber. The measured SPL is 85.0 dB when all compressors are switched on. When half of the compressors are shut down, the SPL measured at the same location is 82.3 dB. Assuming all sound sources are uncorrelated, what is the SPL of the background noise at this location?

Four identical compressors are tested in an anechoic chamber with some background noise. A sound pressure level (SPL) meter is placed at a fixed location in the chamber. The measured SPL is 85.0 dB when all compressors are switched on. When half of the compressors are shut down, the SPL measured at the same location is 82.3 dB. Assuming all sound sources are uncorrelated, what is the SPL of the background noise at this location?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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