Sound field equalization by active acoustic impedance control

Junji Hagio, Akihiro Kakiuchi, Akira Omoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study examined sound field equalization by using active control. The specific acoustic impedance, the ratio of sound pressure and particle velocities is adopted as a target of control. Providing the impedance in the aimed direction is controlled to be the characteristic impedance of the medium, the propagating plane wave in any particular direction would be expected. In addition, the directional characteristic of the sound propagation can also be controlled by adjusting the weight of ratios of pressure and velocity in three orthogonal directions. The results of numerical simulations using impulse response measured in a small enclosure indicate the potential efficiency of the proposed method and the propagating plane wave could be observed. Furthermore, the results of subjective experiments indicate that the proposed method may alter the perceived direction of incoming sound by controlling the sound field nearby the human listening position.

Original languageEnglish
Title of host publication40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Pages2603-2608
Number of pages6
Publication statusPublished - Dec 1 2011
Event40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan
Duration: Sep 4 2011Sep 7 2011

Publication series

Name40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Volume3

Other

Other40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
CountryJapan
CityOsaka
Period9/4/119/7/11

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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