Jin Jiangming, Cheng Hao, Xie Tianwei, Lu Huancai
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.
College of Science, Zhejiang University of Technology, Hangzhou 310023, China.
Materials (Basel). 2021 Jan 16;14(2):429. doi: 10.3390/ma14020429.
Controlling low frequency noise in an interior sound field is always a challenge in engineering, because it is hard to accurately localize the sound source. Spherical acoustic holography can reconstruct the 3D distributions of acoustic quantities in the interior sound field, and identify low-frequency sound sources, but the ultimate goal of controlling the interior noise is to improve the sound quality in the interior sound field. It is essential to know the contributions of sound sources to the sound quality objective parameters. This paper presents the mapping methodology from sound pressure to sound quality objective parameters, where sound quality objective parameters are calculated from sound pressure at each specific point. The 3D distributions of the loudness and sharpness are obtained by calculating each point in the entire interior sound field. The reconstruction errors of those quantities varying with reconstruction distance, sound frequency, and intersection angle are analyzed in numerical simulation for one- and two-monopole source sound fields. Verification experiments have been conducted in an anechoic chamber. Simulation and experimental results demonstrate that the sound source localization results based on 3D distributions of sound quality objective parameters are different from those based on sound pressure.
在工程领域，控制室内声场中的低频噪声始终是一项挑战，因为很难精确地对声源进行定位。球面声全息技术能够重建室内声场中声学量的三维分布，并识别低频声源，但控制室内噪声的最终目标是提高室内声场的音质。了解声源对音质目标参数的贡献至关重要。本文提出了从声压到音质目标参数的映射方法，其中音质目标参数是根据每个特定点处的声压计算得出的。通过计算整个室内声场中的每个点，获得响度和尖锐度的三维分布。针对单极子声源声场和双极子声源声场，在数值模拟中分析了这些量随重建距离、声频和相交角变化的重建误差。在消声室中进行了验证实验。模拟和实验结果表明，基于音质目标参数三维分布的声源定位结果与基于声压的声源定位结果不同。
