THE DETERMINATION OF THE PROTECTIVE EFFECT OF TROUGH STRUCTURES AGAINST TRAFFIC NOISE

ZUR BERECHNUNG DER SCHUTZWIRKUNG VON TROGBAUWERKEN GEGEN STRASSENVERKEHRSGERAEUSCHE

For the experimental determination of attenuation from multiple reflections model tests on the propagation of sound in the vicinity of sunken roads were carried out using models of trough structures built to a reduced scale (1:20). With the aid of the test results a method for the determination of the reduction of average sound levels due to trough structures was formulated, its basis and application being explained. The reductions due to multiple reflections were considered separately. As an example the attainable reduction in mean sound levels for various cross-sections of trough structures at a distance of 10 M and heights varying from 2,5 to 10 M is calculated. The examples make it clear that the surface of the tunnel walls (of high or low absorption) has a considerable influence on the attainable degree of attenuation. In addition the effect achieved with projections is often over-estimated. The highest attenuation values can be achieved, when the walls of the trough have a sound-absorbent cladding and if in addition projections carrying a sound-absorbing baffle wall are provided. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00392197
• Corporate Authors:

  Verlag fuer Publizataet

  Auf der heide 20
  300 Isernhagen HB, Hannover,   Germany 
• Authors:
  • ULLRICH, S
• Publication Date: 1977

Language

• German

Media Info

• Features: Figures; Tables;
• Pagination: p. 12-15
• Serial:
  • Strassen und Tiefhau
  • Volume: 31
  • Issue Number: 6
  • Publisher: Verlag fuer Publizataet
  • ISSN: 0039-2197

Subject/Index Terms

• TRT Terms: Adsorption; Cutting (Earthwork); Noise barriers; Prevention; Sound; Sound level; Traffic; Traffic noise; Troughs (Geology); Tunnel lining; Tunnels
• Uncontrolled Terms: Attenuation
• Old TRIS Terms: Troughs
• ITRD Terms: 7154: Adsorption; 2812: Cutting (earthworks); 9149: Prevention; 6748: Sound; 6747: Sound level; 755: Traffic; 3374: Tunnel; 3385: Tunnel lining
• Subject Areas: Bridges and other structures; Design; Environment; Highways; Operations and Traffic Management; Security and Emergencies; I10: Economics and Administration;

Filing Info

• Accession Number: 00314732
• Record Type: Publication
• Source Agency: Bundesanstalt für Straßenwesen (BASt)
• Files: ITRD, TRIS
• Created Date: Oct 27 1980 12:00AM