マイクロホンの指向性を考慮した音源位置同定法に関する研究

概要

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It is an extremely important matter to identify the noise sources and the noise emitted frequency, when abating the noise such as the engine noise, the machinery noise, etc. Moreover, the visualizing the noise sources is very useful for understanding the various noise problems intuitively. With these backgrounds, the previous study discussed the sound source identification methods and the visualization methods such as an acoustic holography (AH) method, a modified acoustic holography (MAH) method and a MUSIC method. However, there are few studies on the sound source identification method using a microphone directivity pattern. Nevertheless, we have to consider the directivity pattern of used microphones when we actually apply these identification methods. This paper discusses effect of the directivity pattern upon the identification error through the computation and the experimental examination when we used the AH, MAH and MUSIC methods. Furthermore, this paper proposes the identification methods which can consider the microphone directivity pattern for the AH, MAH and MUSIC methods.
公益社団法人精密工学会の論文
2005-11-05