A Measuring Instrument of Sound Absorption Coefficient by use of Impulsive Sound

• OBATA Shinichi

  Ontek R & D Co., Ltd.

• MIKAMI Keiji

  Ontek R & D Co., Ltd.

• ONO Takahiko

  Onosokki Co., Ltd.

• SUZUKI Hideo

  Onosokki Co., Ltd.

• OKOSHI Masaru

  Onosokki Co., Ltd.

• KIDO Keniti

  Onosokki Co., Ltd.

Bibliographic Information

Other Title

• 330 インパルス音を用いた吸音率測定装置

Abstract

The development of an in-situ instrumentation system to measure the sound absorption coefficient of the road surface is strongly demanded for the purpose of the maintenance of the drainage pavements. This paper describes the structure and the performance of the developed system. In the system, a loudspeaker radiates and impulsive sound and a microphone picks up the incident sound and the reflected sound. As the height of the system has big influence on the performance, the effects of the height are mainly investigated. According to the results, the microphone height should be higher than 50cm. If the height is lower, there can be a considerable error due to the slight change in the microphone height.

Journal

• Dynamics and Design Conference : 機械力学・計測制御講演論文集 : D & D

  Dynamics and Design Conference : 機械力学・計測制御講演論文集 : D & D 2000 (0), 144-, 2000-09-01

  The Japan Society of Mechanical Engineers

Keywords

• Sound Absorption Coefficient
• Road Surface
• Impulsive sound
• Incident Sound
• Reflected Sound
• Microphone Height

Details

• CRID: 1573950401935112064
• NII Article ID: 110002482507
• NII Book ID: AA11901770
• ISSN: 13480235
• Text Lang: ja
• Data Source:
  • CiNii Articles