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| Uncertainty Evaluation for the Measurement of Sound Absorbing Coefficient in Reverberation Room |
| QIAN Zhong-chang1,2,FU Yun-xia1,YU Pei-ying1,DENG Zheng1,CHEN Wen-wang1 |
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Abstract Based on the measurement of sound absorption coefficient in reverberation room, the source of the uncertainty of measurement result is identified. Uncertainty components are further analyzed, results showed that the measurement uncertainty of absorption coefficient is mainly introduced by measurement of reverberation time, the volume of reverberation room, size of specimen and velocity of sound measurement have little contribution to the uncertainty of sound absorption coefficient measurement. The uncertainty of reverberation time measurement depends on the diffusion degree of room sound field , the contribution of measuring device is small.
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Received: 20 March 2015
Published: 31 May 2016
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2016, Vol. 37 
