用声场合成法测量漫射场声吸收

IF 1 3区 物理与天体物理 Q4 ACOUSTICS
S. Dupont, Maryna Sanalatii, M. Melon, O. Robin, A. Berry, J. Le Roux
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引用次数: 0

摘要

提出了一种利用声场合成技术测量材料散射场吸声系数的方法。首先利用平面扬声器阵列在被测材料表面产生变入射角的声平面波。使用靠近样品表面的双传声器探头,然后估计与角度相关的声吸收系数。最后,根据Paris公式计算了散射场吸收系数。数值模拟用于评估最大入射角值和单个入射角的数量各自的影响,这是需要一个稳健的漫射声场吸收计算。对三种不同的材料进行了测量,并与Johnson-Champoux-Allard理论得到的模拟结果或使用标准混响室方法得到的测量结果进行了比较。对于所有考虑的材料和在较宽的频率范围内,所提出的方法导致的结果比使用标准化方法获得的结果更符合理论预测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Measurement of the diffuse field sound absorption using a sound field synthesis method
A method for measuring the diffuse field sound absorption coefficient of a material using sound field synthesis is proposed. A planar loudspeaker array is first used to generate acoustic plane waves with variable incidence angle on the surface of a material under test. Using a two-microphone probe positioned closely to the sample’s surface, the angle-dependent sound absorption coefficients are then estimated. Finally, the diffuse field absorption coefficient is computed following Paris formula. Numerical simulations are used to evaluate the respective effects of the maximum incidence angle value and the number of individual incidence angles that are required for a robust calculation of the diffuse sound field absorption. Measurements are conducted on three different materials and compared with either simulation results obtained using the Johnson-Champoux-Allard theory, or with measurement results obtained using the standard reverberation chamber method. For all considered materials and over a wide frequency range, the proposed method leads to results that are in better agreement with theoretical predictions than those obtained using standardized methods.
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来源期刊
Acta Acustica
Acta Acustica ACOUSTICS-
CiteScore
2.80
自引率
21.40%
发文量
0
审稿时长
12 weeks
期刊介绍: Acta Acustica, the Journal of the European Acoustics Association (EAA). After the publication of its Journal Acta Acustica from 1993 to 1995, the EAA published Acta Acustica united with Acustica from 1996 to 2019. From 2020, the EAA decided to publish a journal in full Open Access. See Article Processing charges. Acta Acustica reports on original scientific research in acoustics and on engineering applications. The journal considers review papers, scientific papers, technical and applied papers, short communications, letters to the editor. From time to time, special issues and review articles are also published. For book reviews or doctoral thesis abstracts, please contact the Editor in Chief.
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