Effect of the spectrum of a high-intensity sound source on the sound-absorbing properties of a resonance-type acoustic lining

Experimental results are presented on the effect of both the sound pressure level and the type of spectrum of a sound source on the impedance of an acoustic lining. The spectra under study include those of white noise, a narrow-band signal, and a signal with a preset waveform. It is found that, to o...

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Bibliographic Details
Published in:Acoustical physics 2012-07, Vol.58 (4), p.426-433
Main Authors: Ipatov, M. S., Ostroumov, M. N., Sobolev, A. F.
Format: Article
Language:English
Subjects:
Acoustic impedance
Acoustic measurement
Acoustic noise
Acoustical Ecology. Noise and Vibration
Acoustics
Impedance
Physics
Physics and Astronomy
Sound pressure
Sound sources
White noise
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Summary:Experimental results are presented on the effect of both the sound pressure level and the type of spectrum of a sound source on the impedance of an acoustic lining. The spectra under study include those of white noise, a narrow-band signal, and a signal with a preset waveform. It is found that, to obtain reliable data on the impedance of an acoustic lining from the results of interferometric measurements, the total sound pressure level of white noise or the maximal sound pressure level of a pure tone (at every oscillation frequency) needs to be identical to the total sound pressure level of the actual source at the site of acoustic lining on the channel wall.
ISSN:1063-7710
1562-6865
DOI:10.1134/S1063771012040082