Experimental Estimation of the Frequency-Dependent Reflection Coefficient of a Sound-Absorbing Material at Oblique Incidence

A method for experimentally determining the frequency-dependent reflection coefficient of a sound-absorbing material at oblique incidence is presented. The M -sequence method and a monopole source are used to measure pulse responses of melamine foam for different angles of incidence of an acoustic w...

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Bibliographic Details
Published in:Acoustical physics 2018-03, Vol.64 (2), p.158-163
Main Authors: Belous, A. A., Korol’kov, A. I., Shanin, A. V.
Format: Article
Language:English
Subjects:
Acoustics
Angle of reflection
Incidence angle
Melamine
Noise control
Physical Acoustics
Physics
Physics and Astronomy
Reflectance
Reflection
Sound transmission
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Summary:A method for experimentally determining the frequency-dependent reflection coefficient of a sound-absorbing material at oblique incidence is presented. The M -sequence method and a monopole source are used to measure pulse responses of melamine foam for different angles of incidence of an acoustic wave. Frequency dependencies of the reflection coefficient obtained at different angles of incidence are compared with that calculated theoretically using the Biot model and approximate inversion of the Fourier–Bessel integral.
ISSN:1063-7710
1562-6865
DOI:10.1134/S1063771018020021