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Locating Source of Vehicle Pass-by Noise Using Beamforming Method

Article of Honda R&D Technical Review Vol.16 No.1

Summary

Aiming at reducing vehicle pass-by noise, attention was focused on an analysis method employing high-directivity remote noise source locating technology (beamforming method). The beamforming method is a measurement method that uses a combination of multi-channel sensor technology and signal processing technology. It features the ability to measure the overall noise source in a short time and also the ability to provide a visual indication of the noise source distribution. A study of the shape, arrangement and other specifications of the beamforming array for analyzing vehicle pass-by noise was carried out. Based on the results a noise source locating test was performed using both a dummy noise source and an actual vehicle. As a result (1) a noise source locating instrument that had the required locating accuracy and dynamic range was realized, and (2) it was confirmed by using this instrument to analyze vehicle pass-by noise that this method was effective for reducing noise.

Reference

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(5) Stoker, R.W., et al.: Investigations of Airframe Noise in Pressurized Wind Tunnels, AIAA/CEAS 2001-2107 (2001)
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Author (organization or company)

Yukihiko HANZAWA(Tochigi R&D Center)、Jun KITAHARA(Tochigi R&D Center)、Shinichi NISHIMURA(Tochigi R&D Center)

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