Combined Spherical Nearfield Acoustic Holography and Sound Quality Analyses
The Spherical Nearfield Acoustic Holography—Sound Quality (SNAH-SQ) hybrid methodology is proposed in this paper. This methodology builds the mapping model from distribution of sound pressure to sound quality parameters on basis of reconstruction of the t
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Abstract The Spherical Nearfield Acoustic Holography—Sound Quality (SNAH-SQ) hybrid methodology is proposed in this paper. This methodology builds the mapping model from distribution of sound pressure to sound quality parameters on basis of reconstruction of the three-dimensional distribution of interior acoustic parameters reconstructed by SNAH. The three-dimensional distribution of sound quality parameters related to the human’s subjective auditory experience can be obtained. The sound field which contained two monopole sound sources is used to conduct numerical simulation study. The distribution of sound quality parameters and the sound source localization results varied with the sound field reconstruction distance, sound frequency, and intersection angle between two sound sources. The advantages of the traditional sound source localization by nearfield acoustic holography and the sound quality sound field evaluation are adopted in the SNAH-SQ method which could provide an approach to revealing the threedimensional inherent correlation between noise source locations and sound quality parameters distribution, and locate the noise sources with most annoyance. Keywords Nearfield acoustic holography
Sound quality Matrix mapping
J. Jin (&) H. Lu W. Hu M. Li F. Yuan Sound and Vibration Lab, College of the Mechanical Engineering, Zhejiang University of Technology, No. 18, Chao Wang Road, Hangzhou, People’s Republic of China e-mail: [email protected] URL: http://www.acoustics.zjut.edu.cn
Y. Zhou et al. (eds.), Fluid-Structure-Sound Interactions and Control, Lecture Notes in Mechanical Engineering, DOI: 10.1007/978-3-642-40371-2_41, Ó Springer-Verlag Berlin Heidelberg 2014
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1 Introduction The method of nearfield acoustic holography (NAH) (Lu and Li 2012) cannot reveal the global psychoacoustic attributes features of indoor sound field, which could be obtained by sound quality objective analysis. While traditional sound quality analysis (Blauert and Jekosch 2003) cannot show the 3D sound source distribution, we introduced a new way to find the 3D sound source distribution which is the Spherical Nearfield Acoustic Holography—Sound Quality (SNAH-SQ) hybrid method. The essential idea of this method is that from 3D distribution of interior acoustic parameters (Song 2008; Song et al. 2008) reconstructed by (SNAH) we can find the three-dimensional distribution of sound quality parameters can be obtained, which represent the human auditory percetion. The sound field with two monopole sources and a certain angle is considered for numerical simulation in this work. The accuracy and validation of the method are verified by the numerical simulation. Errors of numerical simulation are calculated with varying reconstruction distance and frequency of sound field. The 3D distribution trend of sound quality parameters varied with the sound field reconstruction distance, sound frequency, and intersection angle between two sound sources in a sound field with two monopole sources are also studied in this
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