A Study of AVAS (Acoustic Vehicle Alerting System) Acoustic Designs
Optimal solutions and design strategies, validated by 1,000-person panel across five countries
Summary
This report is a technical report summarizing the acoustic design of Acoustic Vehicle Alerting Systems (AVAS) based on the expertise of Ono Sokki Co., Ltd. (Ono Sokki) and its group company Sound One Co., Ltd. (Sound One), which specialize in noise and vibration measurement.
While the introduction of AVAS is progressing as a response to the pedestrian safety risks associated with the quietness of electric vehicles, balancing detectability, environmental harmony, and brand image is a challenge. In this report, considering these three elements as the "Impossible Trinity," evaluation data from over 1,000 listeners in five countries with acoustic physical quantities were integrated and analyzed. The results show that acceptance characteristics differ from market to market, making optimization difficult with a single specification. In AVAS design, data-driven optimization that links physical quantities with subjective evaluation is effective, and strategic sound design considering market adaptation is important.

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Japan
USA
Mexico
Germany
China (Shanghai)
Thailand
India