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2020 Fiscal Year Final Research Report

Development of Comprehensive Acoustic Environment Simulation System for Realization of Ultra-realistic Presence

Research Project

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Project/Area Number 17H00811
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Design science
Research InstitutionKyushu University

Principal Investigator

Omoto Akira  九州大学, 芸術工学研究院, 教授 (00233619)

Project Period (FY) 2017-04-01 – 2021-03-31
Keywords音場再生 / 鋭指向性マイク / ビームフォーミング
Outline of Final Research Achievements

In order to improve the overall performance of a sound field reproduction system, a system consisting of 24 narrow directional microphone arrays and the same number of loudspeakers was investigated. The performance of the system was evaluated using both physical measurements and human subjective evaluations, based on the assumption that the performance depends on the following four conditions: A) physical basis for the reproduction, B) robustness against inevitable disturbances such as the presence of listeners, C) room for additional effects, and D) high compatibility with video information.
The results show that beamforming, which limits the nature of the signal during recording, is very effective. In addition, it was found that video information significantly improved the sense of immersion. However, there was some compatibility with the content.

Free Research Field

建築音響学

Academic Significance and Societal Importance of the Research Achievements

本研究で提案したシステムは,鋭指向性のマイクとほぼ同方向に配置したスピーカの組み合わせで実現されるものであり,直感的にもわかりやすい構成である。更に球面調和領域での指向性制御という比較的新しい信号処理技術を導入することで,高い基本的性能を持つシステムを構築することができた。また録音等で用いられる機材を導入することで,高品質の収録再生が可能となっている。
聴感上の印象もよく,結果として工学的デザインおよび芸術的なデザインの両立に成功していると考えている。これは複数の企業の研究所等において同様のシステムが構築され,社会実装されていることからも明らかである。

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Published: 2022-01-27  

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