On the accuracy of the power spectrum estimate in the directive spectrum analyzing system by use of a moving microphone

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概要

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• This paper describes two methods of increasing the accuracy of the power spectrum estimate in the directive spectrum analyzing system by use of a moving microphone. The objective of the system is to estimate the power spectrum radiated from a specified sound source when there are some other sources. The system is composed of two microphones, one of which is fixed and the other moves along a straight line from the fixed microphone to the sound source. By giving adequate delay to the output of the moving microphone, the system estimates the power spectrum of sound from the direction of the sound source, eliminating the effects of sounds from other directions. First, this paper presents a method of giving the delay in the frequency domain instead of the time domain by which the accurate delay is given to the output of the moving microphone. Secondly, this paper presents a method of suppressing the side lobes with an adequate spatial weighting, by which the errors due to the sounds from other directions are decreased.

• 社団法人日本音響学会の論文
• 1980-04-00

著者

• Abe Masato

  Research Center For Applied Information Science Tohoku University

• Abe Masato

  Research Center For Applied Information Sciences Tohoku University

• Ishigame Masaaki

  Research Center for Applied Information Sciences, Tohoku University

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• On the accuracy of the power spectrum estimate in the directive spectrum analyzing system by use of a moving microphone

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