Acoustic impedance control for generating virtual wall

Eiji Yokota, Seiichiro Katsura

Research output: Contribution to journalArticlepeer-review


Realistic systems have received increasing attention auditory sense plays a significant role, sound-field reproduction that generates high-presence sound-field is important. Key factor affecting the presence of sound-field is the influence of echo. Therefore, this study focuses on the effect of echo for a more realistic sound-field reproduction. In this study, the sound wave from a sound source is exposed to the echo effect through an acoustic impedance control performed by constructing a virtual wall. The virtual acoustic impedance is controlled by the sound wave generated from a secondary sound source the virtual wall acoustic impedance varies at a certain distance from the sound source. Therefore, an echo effect is produced through the control of the acoustic impedance the listener feel as if direct sound was reflected at the position of the virtual wall.

Original languageEnglish
Pages (from-to)650-655
Number of pages6
JournalIEEJ Journal of Industry Applications
Issue number6
Publication statusPublished - 2020 Nov 1


  • Acoustic impedance control
  • Sound field reproduction
  • Ultra-realistic system

ASJC Scopus subject areas

  • Automotive Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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