消声室
声学
声压
辐射
辐射阻抗
物理
扬声器
声辐射
辐射特性
噪音(视频)
空气声学
光学
计算机科学
人工智能
图像(数学)
作者
Maryna Sanalatii,Philippe Herzog,Manuel Melon,Régine Guillermin,Jean‐Christophe Le Roux
出处
期刊:Journal of the Acoustical Society of America
[Acoustical Society of America]
日期:2024-03-01
卷期号:155 (3): 1641-1654
摘要
The measurement of the pressure field radiated by a sound source has many applications in the fields of noise control and loudspeaker system design. In this paper, the radiation mode method is used to measure the field radiated by a complex acoustic source whose surface impedance is arbitrary and does not correspond to the Neumann boundary condition used for the calculation of radiation modes. The most effective radiation modes are used as test functions to calculate a pressure expansion around the source under test, an expansion that matches the measured pressure at a limited number of points close to the source. This expansion is then used to calculate the radiated pressure at a greater distance at unmeasured locations. In a first step, numerical simulations are performed to evaluate the method's most influential parameters. Then, measurements are performed in a semi-anechoic room on two real sources of increasing complexity. Obtained results show that the radiation mode method allows an accurate evaluation of the pressure field radiated by the test object over a fairly wide frequency band (between 100 Hz and 2 kHz) even for complex sources.
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