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| Development of Advanced In-situ Measurement Technology for Sound Absorption Coefficient |
| Received:November 07, 2020 Revised:November 29, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.12.007 |
| KeyWord:sound absorption coefficient standing wave tube reverberation chamber in-situ measurement |
| Author | Institution |
| LI Dong-xu |
The Third Military Representative Office of Navy Equipment Guangzhou Bureau in Chongqing, Chongqing , China |
| ZHANG Xia |
Shanxi Diesel Engine Industry Co.Ltd., Datong , China |
| NIE Jia-xing |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| HUANG An-wei |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| WU Yong-peng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| SUN Cai-yun |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| DONG Ling-shu |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| GUO Feng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| Firstly, the work introduced the most commonly used standing wave tube method and reverberation chamber method for testing sound absorption coefficient and expounded the advantages and disadvantages of the two methods. The standing wave tube method tested the normal sound absorption coefficient, and the reverberation chamber method obtained the average sound absorption coefficient in each incident direction. There were certain differences between the two methods and the actual installation conditions. It was difficult to complete the measurement of sound absorption coefficient accurately in the complex environment. In many cases, sound absorption coefficient in the actual working environment should be tested. Thus the principle and research progress of in-situ measurement methods for sound absorption coefficient include the transfer function method, PU vector method, parametric array speaker method, impulse response method, cepstrum method, longest sequence number method and subtraction technique were summarized. And the advantages and disadvantages of each test method were analyzed. |
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