Browse > Article

Sound Transmission Loss Measurement for Sound Isolation Sheets by Two-Microphone Impedance Tube Method  

Lee, Dong-Hoon (Department of Mechanical Engineering, Seoul National University of Technology)
Yong, Ho-Taek (Department of Mechanical Engineering, Seoul National University of Technology)
Lee, Seung (Department of Mechanical Engineering, Graduate School of Industry and Engineering, Seoul National University of Technology)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.14, no.1, 2002 , pp. 63-72 More about this Journal
Abstract
The main objective of this study is to propose a practical two-microphone impedance tube method to measure the sound transmission loss for flexible sound isolation sheets without the use of the time-consuming and expensive reverberation room. This method was based on the sound decomposition theory developed by Seybert using the spectral density functions of the incident and reflected sound waves. In order to verify the validity of the experimental results, the measured sound transmission losses from the proposed method were compared with the measured data from the reverberation room method and the calculated data from the theory satisfying the mass law of sound isolation material. The resulted trends of the sound transmission losses versus frequencies for several different sound isolation sheets were almost same for each other and agreed quite well in both methods except at some low frequency region. From the experimental results, it was found that the accuracy of sound isolation capability obtained by two-microphone impedance tube method depends upon the microphone spacing, the distance from the first microphone to the test sample surface and the test sample location.
Keywords
Impedance tube method; Mass law; Reverberation room method; Sound isolation sheet; Sound transmission loss; Sound transfer function;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Two-sensor methods for the measurement of sound intensity and acoustic properties in ducts /
[ Seybert, A. F. ] / J. Acoust. Soc. Am.   DOI
2 A Study of Validity on the Sound Transmission Loss Measurement of Sound Isolation Sheets Using Two-Microphone /
[ Lee, D. H.;Kang, M.;Seto, K. ] / Proceedings of the KSAE Autumn Conference
3 Development of a new sound transmission test for automotive sealant materials /
[ Bolton, J. S.(et al.) ] / SAE transactions, Jr. Pass. Cars
4 /
[ Beranek, LEO L.;VER, Istvan L. ] / Noise and Vibration Control Engineering (Principles and Applications)
5 Reflection coefficients for an unflanged pipe with flow /
[ Davies, P. O. A. L.(et al.) ] / J. Sound and Vibration
6 Intercomparisons of Laboratory Determinations of Airborne Sound Transmission Loss /
[ Jones, R. E. ] / J. Acoust. Soc. Am.   DOI   ScienceOn
7 /
[ ASTM ] / Standard test method for laboratory measurement of airborne sound transmission loss of building partitions
8 Transfer function method of measuring induct acoustic properties, I. Theory and II. Experiment /
[ Chung, J. Y.;Blaser, D. A. ] / J. Acoust. Soc. Am.   DOI   ScienceOn
9 A study on measurement of sound transmission loss for sound isolation sheets by two-microphone impedance tube method /
[ Lee, D. H.;Kim, D. W.;Seto, K. ] / Proceedings of the 8th International Congress on Sound and Vibration
10 Sound Transmission Loss Measurement of Sound Isolation Sheets Using Impedance Tube Method /
[ Lee, S.;Lee, D. H.;Yong, H. T.;Suh, K. W. ] / Proceedings of the SAREK Summer Annual Conference
11 Measurement of transmission loss of panels by the direct determination of transmitted acoustic intensity /
[ Crocker, M. J.(et al.) ] / Noise Control Engineering   DOI   ScienceOn
12 Direct measurement of transmission loss of aircraft structures using the acoustic intensity approach /
[ Wang, Y. S.;Crocker, M. J. ] / Noise control Engineering   DOI
13 A Study on the Sound Transmission Loss Measurement of Sound Isolation Sheets /
[ Lee, D. H.;Kang, M.;Lee, J. W.;Jung, G. C.;Kwon, Y. P. ] / Proceedings of the KSNVE Autumn Conference
14 Development of Sound Isolation Sheets with Compound Materials /
[ Lee, D. H.;Lee, T. K.;Cheong, S. K.;Lee, H. W.;Kang, M.;Kim, Y. B. ] / Proceedings of the KSNVE Autumn Conference
15 The Tenth Sir Richard Fairey Memorial Lecture:Sound Trnasmission in Buildings /
[ Heckl, M. ] / Journal of Sound and Vibration   DOI   ScienceOn