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An improved moving frame acoustic holography for coherent bandlimited noise

 

作者: Soon-Hong Park,   Yang-Hann Kim,  

 

期刊: The Journal of the Acoustical Society of America  (AIP Available online 1998)
卷期: Volume 104, issue 6  

页码: 3179-3189

 

ISSN:0001-4966

 

年代: 1998

 

DOI:10.1121/1.423958

 

出版商: Acoustical Society of America

 

数据来源: AIP

 

摘要:

The moving frame acoustic holography method, which can increase the aperture size and spatial resolution of a hologram was recently proposed [H.-S. Kwon and Y.-H. Kim, J. Acoust. Soc. Am.103, 1734–1742 (1998)]. This method continuously sweeps a stationary sound field by using a line array of microphones so that the hologram of a scanned plane can be obtained. This method enables us to visualize the noise generated by moving noise sources based on near-field acoustic holography. However, a drawback is that it can be applied only to sinusoidal components. This limits its practical application. In practice, bandlimited and transient noise, as well as a sinusoidal component, must be dealt with in order to effectively control the noise generated by the moving noise sources. This paper addresses a way to improve the moving frame acoustic holography method so that it can be applied not only to sinusoidal components, but also to a coherent bandlimited noise. The practical applicability of the improved method is also verified by experiments.

 

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