Binaural synthesis using a spherical microphone array based on the solution to an inverse problem

Sakamoto Shuichi, César Salvador, Jorge Treviño, Yôiti Suzuki

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

Abstract

Binaural technologies can convey rich spatial auditory information to listeners, using simple equipment such as headphones. Head-related transfer function (HRTF) datasets and spherical microphone arrays are important components to realize advanced binaural recording and reproduction methods. One of these methods is binaural Ambisonics, which captures and reproduces a three-dimensional sound space based on a spherical harmonic analysis. We have proposed an advanced binaural reconstruction method without relying on an intermediate sound field representation. In this method, known as SENZI (Symmetrical object with ENchased ZIllion microphones), individualized binaural signals are directly generated from the microphone recordings by applying weighting filters, which are calculated by inverting a linear system. The accuracy of the sound space synthesized by SENZI is higher at the head-shadow region than that synthesized by conventional binaural Ambisonics. However, the number of microphones imposes a limit on the accuracy at higher frequencies according to sampling theory. This limit can be overcome by making assumptions on the recorded contents or using perceptual information. Because the sensitivity to the phase of human spatial hearing decreases at higher frequencies, we propose utilizing this perceptual knowledge to reconstruct high-frequency contents. Simulation results revealed that high-frequency amplitudes are accurately reproduced using the proposed approach.

Original languageEnglish
Title of host publicationINTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering
EditorsAntonio Calvo-Manzano, Ana Delgado, Antonio Perez-Lopez, Jose Salvador Santiago
PublisherSOCIEDAD ESPANOLA DE ACUSTICA - Spanish Acoustical Society, SEA
ISBN (Electronic)9788487985317
Publication statusPublished - 2019 Jan 1
Event48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID - Madrid, Spain
Duration: 2019 Jun 162019 Jun 19

Publication series

NameINTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering

Conference

Conference48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID
CountrySpain
CityMadrid
Period19/6/1619/6/19

Keywords

  • Ambisonics
  • Binaural technology
  • Spherical acoustics
  • Spherical microphone array

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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