EVALUATION OF T-PROFILE HIGHWAY NOISE BARRIERS

An acoustical performance evaluation of unique 5-m-high sound-absorbing parallel highway noise barriers, with a horizontal cap to form a T-profile, is presented. The evaluation was done by using (a) direct field measurements, (b) analytical procedures based on the STAMINA 2.0 computer program and the application of geometrical acoustics, and (c) acoustical scale modeling. Noise measurements in the residential area behind the barriers indicated that the addition of a 1-m-wide horizontal cap on top of the barrier had increased its insertion loss by about 1 dB(A). Similar results were obtained by acoustical scale modeling, which also indicated that it is usually acoustically more effective to increase the barrier height rather than to build a T-top.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1984/983/983-002.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=EVALUATION+OF+T-PROFILE+HIGHWAY+NOISE+BARRIERS&author=J.+Hajek&author=C.+Blaney&publication_year=1984
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. Publication of this paper sponsored by Committee on Transportation-Related Noise and Vibration.
• Authors:
  • Hajek, J J
  • Blaney, C T
• Publication Date: 1984

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 8-17
• Monograph Title: Issues in transportation noise mitigation: highway and railway studies
• Serial:
  • Transportation Research Record
  • Issue Number: 983
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Acoustic measuring instruments; Acoustics; Evaluation; Helicopters; Noise barriers; Residential areas; Sound absorption
• Old TRIS Terms: Acoustic measurement
• Subject Areas: Highways; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00399854
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Feb 28 1986 12:00AM