Revolving microphone system for estimating the direction and spectrum of incident sound

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概要

• 論文の詳細を見る

• This paper describes a directive spectrum analyzing system using two microphone, one of which is fixed and the other revolves around the fixed one. In this system, the direction of the main lobe of the directivity can be arbitrarily changed on the plane of revolution by adjusting the delay time given to the outputs of the microphones. The sound to be analyzed should be stationary during the period of revolution. A unibeam directivity is achieved when the outputs of the microphones are delayed so that the delayed signals are in phase for the incident sound from a specified direction. After providing the adequate delay time, the power spectra and cross spectrum are computed during a full turn of the revolving microphone, and the power spectrum of the incident sound from the specified direction is estimated.

• 社団法人日本音響学会の論文

著者

• Abe Masato

  Research Center For Applied Information Science Tohoku University

• Isigame Masaaki

  Research Center for Applied Information Sciences,Tohoku University

• Isigame Masaaki

  Research Center For Applied Information Sciences Tohoku University

• Abe Masato

  Research Center for Applied Information Sciences,Tohoku University

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• Revolving microphone system for estimating the direction and spectrum of incident sound
• On the accuracy of the power spectrum estimate in the directive spectrum analyzing system by use of a moving microphone

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