Development of traffic noise evaluation system based on multi-scale wave acoustic analysis using VR technology

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04321
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22060:Environmental systems for civil engineering-related
• Research Institution: Chuo University
• Principal Investigator: Kashiyama Kazuo 中央大学, 理工学部, 教授 (10194721)
• Co-Investigator(Kenkyū-buntansha): 吉川 仁 京都大学, 情報学研究科, 准教授 (90359836)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 交通騒音 / VR / 波動音響理論 / 可聴化 / マルチスケール法 / 時変畳み込み

Outline of Final Research Achievements

This study was conducted to develop a highly accurate and practical traffic noise evaluation system that can be used for preliminary evaluation and posteriori analysis of the sound environment caused by new construction or modification of roads and surrounding structures, and for the design of sound barriers. The finite element method and the boundary element method based on the three-dimensional wave acoustic theory were used as numerical methods, and the computed unsteady sound pressure level was presented in a VR space as three-dimensional auditory information using VR technology to develop a noise evaluation system. This system is expected to facilitate the understanding of sound pressure levels, which have been difficult to comprehend, and to be a useful tool in planning and designing new roads and surrounding structures, improving the sound environment such as soundproofing measures, and taking steps to build consensus with residents.

Free Research Field

計算力学、応用力学

Academic Significance and Societal Importance of the Research Achievements

本研究で構築する、高精度かつ実用的な交通騒音評価システムは、これまで個別に進歩してきた計算力学における高度な離散化解析技術と、バーチャルリアリティ技術に基づく仮想空間での可視化及び可聴化技術との統合により構築可能となるものである。交通騒音評価および交通施設の計画・設計の新しい創造性（方向性）を与えるものと考える。また、道路やその周辺の構造物の新規の計画や設計、防音対策などの音環境の改善、住民との合意形成などを講じる上で有用なツールとなることが期待できる。