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  • Summary & Details

The Latest Technology of Noise Source Identification and Development of Microphone

マイクロホン技術と音の可視化の最先端

Detailed Information

Category(J)ホットトピックス

Translation

Category(E)Hot Topics
Author(J)1) 竹田 都萌, 2) 平山 正充
Author(E)1) Tomoe Takeda, 2) Masamitsu Hirayama
Affiliation(J)1) スペクトリス, 2) スペクトリス
Abstract(J)音の可視化技術は,自動車開発に際し主要な騒音源への対策技術として発展,定着してきた.音の可視化に利用される,計測用マイクロホン,ペアマイクロホン法の音響インテンシティ測定,また,マイクロホンアレイを利用した近距離場音響ホログラフィ,ビームフォーミング,SONAHについて解説する.近年の音の可視化の事例としてワイドバンドホログラフィや参照信号を用いた解析,音響パワーへの応用,さらに現場吸音率測定について述べる.

Translation

Abstract(E)Technology of noise source identification has been developped and established as a countermeasure for noise source in automobile development. This paper describes sound intensity measurements using measurement microphones and the paired microphone method, as well as near-field acoustic holography, beamforming, and SONAH using microphone arrays, all of which are used for it. Recent examples of it include wideband holography, analysis using reference signals, applications to sound power, and in-situ sound absorption coefficient measurements.

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