| 混响室中混响时间测量偏差的研究 |
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| 引用本文： | 杨小军,沈勇,乐意. 混响室中混响时间测量偏差的研究[J]. 声学技术, 2011, 30(1): 93-97. DOI: 10.3969/j.issn1000-3630.2011.01.017 |
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| 作者姓名： | 杨小军 沈勇 乐意 |
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| 作者单位： | 南京大学声学研究所近代声学教育部重点实验室,南京,210093 |
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| 摘 要： | 在混响室中测量吸声材料的吸声系数时,需要进行混响室中有吸声材料时混响时间的测量和没有吸声材料时混响时间的测量,两者的可重复性和可靠性直接影响到所测材料吸声系数的准确度.通过统计声学和波动声学的基本原理对混响室中混响时间测量的空间偏差和重复偏筹产生的原因进行了分析,并且在多组不同的实验条件下,在南京大学混响室中实测了空场...
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| 关 键 词： | 混响室 混响时间 空间偏差 重复偏差 |
| 收稿时间： | 2010-01-07 |
| 修稿时间： | 2010-03-22 |
Research on the fluctuation of reverberation time measurements in reverberation room |
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| YANG Xiao-jun,SHEN Yong and LE Yi. Research on the fluctuation of reverberation time measurements in reverberation room[J]. Technical Acoustics, 2011, 30(1): 93-97. DOI: 10.3969/j.issn1000-3630.2011.01.017 |
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| Authors: | YANG Xiao-jun SHEN Yong LE Yi |
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| Affiliation: | YANG Xiao-jun,SHEN Yong,LE Yi(Key Laboratory of Modern Acoustics,Nanjing University,Ministry of Education,Nanjing 210093,China) |
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| Abstract: | When measuring the absorption coefficient of a certain material in reverberation room,the reverberation times of the reverberation room both with and without material need to be measured.The repeatability and reliability of the two measurements in reverberation room affect the accuracy of the measured absorption coefficient of this material.The cause of the spatial variance and ensemble variance of the reverberation time measurement is analyzed with the principles of statistic acoustics and wave acoustics.T... |
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| Keywords: | reverberation room reverberation time the spatial variance the ensemble variance |
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