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Transfer Matrix Approach to the Estimation of the Fundamental Acoustical Properties of Noise Control Materials
Technical Paper
1999-01-1667
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new method for evaluating the acoustical properties of porous materials is described here. To implement the procedure, a two-microphone standing wave tube was modified to include: a new sample holder; a section that accommodated a second pair of microphones downstream of the sample holder; and an approximately anechoic termination. A four-point sound pressure method was then used to estimate the two-by-two transfer matrix of the material. The transfer matrix can then be used to determine the wave number and characteristic impedance of the material. The procedure has been used to estimate the acoustical properties of two glass fiber materials.
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Citation
Song, B. and Bolton, J., "Transfer Matrix Approach to the Estimation of the Fundamental Acoustical Properties of Noise Control Materials," SAE Technical Paper 1999-01-1667, 1999, https://doi.org/10.4271/1999-01-1667.Also In
References
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