Attempt to improve the total performance of sound field reproduction system: Integration of wave-based methods and simple reproduction method

Hiroshi Kashiwazaki, Akira Omoto

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

Abstract

The sound field reproduction system can be applied to various applications. The primary objective of the system is to physically reproduce an arbitrary sound field correctly. However, physical accuracy is not the only requirement in a situation where the system is actually used. Through several applications, we assumed the following four factors as total performance; A) physical accuracy, B) robustness against disturbances, C) flexibility for additional direction, and D) capability of integration with visual media. We used 24-channel narrow directional microphone array and 24-channel loudspeaker as a platform to be considered and worked to improve overall performance. As one of the reproduction methods, directional information can be easily reproduced by amplitude panning which relies on the directivity of the microphone themselves, but the microphone leakage effect occurs in the low frequency. On the other hand, wave-based methods such as boundary surface control or higher-order ambisonics are effective for physical accuracy, but control of high frequency is difficult. Therefore, if wave-based method and simple reproduction method are combined, there is a possibility to reproduce a wide frequency range well. We discuss the total performance of this reproduction method through ITD/ILD measurement and visualization of a wide range of wavefront.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages715-722
Number of pages8
ISBN (Electronic)9783939296157
DOIs
Publication statusPublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: Sep 9 2019Sep 23 2019

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
CountryGermany
CityAachen
Period9/9/199/23/19

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Acoustics and Ultrasonics

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