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Criterion for the minimum source distance at which plane-wave beamforming can be applied

 

作者: James G. Ryan,  

 

期刊: The Journal of the Acoustical Society of America  (AIP Available online 1998)
卷期: Volume 104, issue 1  

页码: 595-598

 

ISSN:0001-4966

 

年代: 1998

 

DOI:10.1121/1.423289

 

出版商: Acoustical Society of America

 

数据来源: AIP

 

摘要:

An expression is derived which can be used to determine the extent of the near field for a given microphone array size and operating wavelength. This expression is based on the distortion of the near-field array response, and approximates the distance at which the magnitude response error due to plane-wave beamforming is 1 dB.

 

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