In situ measurements of surface impedance and absorption coefficients of porous materials using two microphones and ambient noise

Applied Acoustics

Volumn 66, Issue 7, 2005, Pages 845-865

  Takahashi, Y ^a   Otsuru, T ^a   Tomiku, R ^a  

^a OITA UNIVERSITY   (Japan)

Author keywords

Ambient noise; Diffuse field; Impedance; In situ; Two microphones

Indexed keywords

ACOUSTIC IMPEDANCE; LOUDSPEAKERS; MATHEMATICAL MODELS; MICROPHONES; POROUS MATERIALS; PROBLEM SOLVING;

AMBIENT NOISE; DIFFUSE FIELDS; IN SITU; TWO MICROPHONES;

ACOUSTIC WAVE ABSORPTION;

EID: 17744380203     PISSN: 0003682X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.apacoust.2004.11.004     Document Type: Article

References (22)

1. M. Garai Measurement of the sound-absorption coefficient in situ: the reflection method using periodic pseudo-random sequences of maximum length Appl Acoust 39 1993 119 139
2. ISO 354, Acoustics - measurement of sound absorption in a reverberation room
3. ISO 10534-1 Acoustics - determination of sound absorption coefficient and impedance in impedance tubes. Part 1: method using standing wave ratio
4. ISO 10534-2 Acoustics - determination of sound absorption coefficient and impedance in impedance tubes. Part 2: transfer function method
5. A.F. Seybert, and D.F. Ross Experimental determination of acoustic properties using a two-microphone random-excitation technique J Acoust Soc Am 61 1977 1362 1370
6. J.Y. Chung, and D.A. Blaser Transfer function method of measuring in-duct acoustic properties. I. Theory J Acoust Soc of Am 68 1980 907 912
7. H. Suzuki, H. Yano, and H. Tachibana A new method of measuring normal incident sound absorption characteristics of materials using acoustic tube J Acoust Soc Jpn E 2 1981 161 167
8. H. Utsuno, T. Tanaka, T. Fujikawa, and A.F. Seybert Transfer function method for measuring characteristic impedance and propagation constant of porous material J Acoust Soc Am 86 1989 637 643
9. T. Iwase, and Y. Izumi A new sound tube measuring method for propagation constant in porous material - method without any air space at the back of test material J Acoust Soc Jpn J 52 6 1996 411 419 [in Japanese]
10. T. Iwase, M. Sato, and R. Kawabata Study of practical improving of new sound tube measuring method for sound propagation constant - reducing technique of resonant vibration of test porous material and application measurements J Architect Planning Environ Eng (AIJ) 503 1998 17 24 [in Japanese]
11. Y. Champoux, J. Nicolas, and J.F. Allard Measurement of acoustic impedance in a free field at low frequencies J Sound Vibr 125 1 1988 313 323
12. J.F. Allard, Y. Champoux, and J. Nicolas Pressure variation above a layer of absorbing material and impedance measurement at oblique incidence and low frequencies J Acoust Soc Am 86 2 1989 766 770
13. J.F. Allard, and Y. Champoux In situ two-microphone technique for the measurement of the acoustic surface impedance of materials Noise Contr Eng J 32 1 1989 15 23
14. J.F. Allard, C. Depollier, and P. Guignouard Free field surface impedance measurements of sound-absorbing materials with surface coatings Appl Acoust 26 1989 199 207
15. H. Tachibana, H. Yano, and K. Ishii Oblique incidence sound absorption characteristics of various absorbing materials measured by cross-correlation method J Acoust Soc Jpn J 34 1 1978 11 20 [in Japanese]
16. M. Tamura Spatial Fourier transform method of measuring reflection coefficients at oblique incidence. I: theory and numerical examples J Acoust Soc Am 88 5 1990 2259 2264
17. M. Tamura, J.F. Allard, and D. Lafarge Spatial Fourier-transform method for measuring reflection coefficients at oblique incidence. II. Experimental results J Acoust Soc Am 97 4 1995 2255 2262
18. A.J. Cramond, and C.G. Don Reflection of impulses as a method of determining acoustic impedance J Acoust Soc Am 75 2 1984 382 389
19. J.F. Li, and M. Hodgson Use of pseudo-random sequences and a single microphone to measure surface impedance at oblique incidence J Acoust Soc Am 102 4 1997 2200 2210
20. T. Iwase A measuring method for sound reflection or absorption coefficient by using two closed microphones with different sensitivities Proc Inter-noise 94 1994 1951 1954
21. Y. Takahashi, T. Otsuru, and R. Tomiku In situ measurements of absorption characteristics by using two microphones and Environmental Anonymous Noise Acoust Sci Technol 24 6 2003 382 385
22. Y. Miki Acoustical properties of porous materials - generalizations of empirical models J Acoust Soc Jpn E 11 1990 25 30