A miniaturized adaptive microphone array under directional constraint utilizing aggregated microphones

Mitsuharu Matsumoto, Shuji Hashimoto

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    20 Citations (Scopus)

    Abstract

    This paper introduces a miniaturized microphone array using the Directionally Constrained Minimization of Power (DCMP) method, which utilizes the transfer functions of microphones located at the same place, namely aggregated microphones. The phased microphone array realizes a noise reduction and direction of arrival (DOA) estimation system according to differences in the arrival time, phase shift, and/or the level of the sound wave for each microphone. Hence it is difficult to miniaturize the microphone array. The objective of our research is to miniaturize the system size using aggregated microphones. In this paper, we first show that the phased microphone array system and the proposed aggregated microphone system can be described within the same framework. We then apply a microphone array under directional constraint to the aggregated microphones and compare the proposed method with the microphone array. We show the directional pattern of the aggregated microphones. We also show the experimental results regarding DOA estimation.

    Original languageEnglish
    Pages (from-to)352-359
    Number of pages8
    JournalJournal of the Acoustical Society of America
    Volume119
    Issue number1
    DOIs
    Publication statusPublished - 2006 Jan

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    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

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