ANALYSIS ON ACOUSTIC CHARACTERISTICS OF AERODYNAMIC SOUNDS FROM SURFACE IRREGULARITIES
Aerodynamic noise is generated by irregularities on the surface of a car body as well as the equipment on a car roof. This paper presents analytical results of acoustic characteristics of sounds radiating from surface irregularities and measured results of aerodynamic sounds generating from simplified irregularities on a flat surface. The analytical results show that interference occurs through reflection of dipole sounds originating from irregularities on the base plane. Such a phenomenon has been verified actually by measured data from low-noise wind tunnel tests.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/3127232
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Corporate Authors:
Railway Technical Research Institute
2-8-38, Hikari-cho, Kokubunji-shi
Tokyo 185, Japan -
Authors:
- Sagawa, A
- Matsuo, J
- Maebashi, E
- Suzuki, Y
- Publication Date: 1997
Language
- English
Media Info
- Features: Figures; References;
- Pagination: p. 95-101
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Serial:
- Railway Technical Research Institute, Quarterly Reports
- Volume: 38
- Issue Number: 2
- Publisher: Railway Technical Research Institute/Tetsudo Gijutsu Kenkyujo
- ISSN: 0033-9008
- Serial URL: http://www.rtri.or.jp/eng/
Subject/Index Terms
- TRT Terms: Acoustic measuring instruments; Acoustics; Aerodynamic noise; Fluid mechanics; Noise control; Surfaces
- Uncontrolled Terms: Surface area
- Old TRIS Terms: Acoustic measurements
- Subject Areas: Environment; Railroads;
Filing Info
- Accession Number: 00739872
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 10 1997 12:00AM