Dynamic local sound field synthesis with multi-channel 1-bit signal reproduction system

Kakeru Kurokawa, Izumi Tsunokuni, Yusuke Ikeda, Yasuhiro Oikawa

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

Abstract

To reproduce sound field accurately, local sound field synthesis(Local SFS) with virtual loudspeakers that are placed densely around a local listening area have been proposed. In local SFS, it is necessary to limit the size of the listening area. Thus, a listener's head can move out of a listening area due to the natural movement of the listener. In this paper, we propose the concept of a dynamic sound field synthesis system which can moves the sound field synthesis area so as to track the listener's head to allow the listener's movement. For the purpose of facilitating the construction of the massive loudspeaker system in an ordinary room, we utilize a playback system based on a high-speed 1-bit signal that can directly drive a loudspeaker. The proposed system can move the listening area by switching the corresponding local SFS signals obtained from the database including the source signals convolved with the driving functions to reproduce the multiple local area. In simulation experiments, reproduction errors of dynamic local and ordinary SFSs for a plane wave are compared to evaluate the accuracy of sound field by dynamic local SFS.

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)
Pages3071-3076
Number of pages6
ISBN (Electronic)9783939296157
DOIs
Publication statusPublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 2019 Sep 92019 Sep 23

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
Period19/9/919/9/23

Keywords

  • CPU/FPGA SoC
  • Delta-sigma modulation
  • Digital Loudspeaker Array
  • Sound Field Reproduction

ASJC Scopus subject areas

  • Mechanical Engineering
  • Acoustics and Ultrasonics

Fingerprint Dive into the research topics of 'Dynamic local sound field synthesis with multi-channel 1-bit signal reproduction system'. Together they form a unique fingerprint.

Cite this