SCALE MODEL EXPERIMENT ON SOUND RADIATION FROM A TUNNEL MOUTH

The Acoustical Society of Japan has published a new road trafflc noise prediction model (ASJ Model 1998) this year, in which noise propagation from various kinds of road structures are modeled. Among them, a simplified model of the calculation of sound radiation from a tunnel mouth is included. To make this model, theoretical studies based on geometrical acoustics, field measurements and 1/40 scale model experiment were performed. In this paper, the result of the scale model study is reported. In this experiment, a spark discharge impulse source was used and the sound energy radiated from the mouth of a model tunnel was measured for discrete sound source positions in the tunnel. From the experimental results, the method of predicting the total sound power generated from the tunnel mouth was investigated. In addition, the directive characteristic of the sound radiation was also measured. These measurements were performed under different acoustical conditions of the interior surface of the tunnel. For the covering abstract see IRRD E104312.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0962207233
• Corporate Authors:

  Institute of Noise Control Engineering

  Iowa State University, 210 Marston Hall
  Ames, IA  United States  50011-2153
• Authors:
  • TACHIBANA, H
  • SAKAMOTO, S
  • NAKAI, A
• Conference:
  • PROCEEDINGS OF INTERNOISE 99 - THE 1999 INTERNATIONAL CONGRESS ON NOISE CONTROL ENGINEERING HELD IN FORT LAUDERDALE, FLORIDA, USA, 6-8 DECEMBER 1999, VOLUME 1
• Publication Date: 1999

Language

• English

Media Info

• Features: References;
• Pagination: p. 387-92

Subject/Index Terms

• TRT Terms: Diffusion (Optics); Forecasting; Mathematical analysis; Noise; Sound; Test procedures; Tunnels
• ITRD Terms: 6471: Analysis (math); 6769: Diffusion; 132: Forecast; 2492: Noise; 6748: Sound; 6288: Test method; 3374: Tunnel
• Subject Areas: Bridges and other structures; Environment;

Filing Info

• Accession Number: 00790199
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-9622072-3-3
• Files: ITRD
• Created Date: Apr 11 2000 12:00AM