NOISE REDUCTION EFFECTS OF LOW-NOISE PAVEMENT AND NOISE BARRIERS

When drainage asphalt pavements are used to reduce traffic noise, they are usually called low-noise pavements. However, the noise reduction effects of low-noise pavements have been verified only by supplementary data obtained at sites where this type of pavement was applied chiefly for its drainage function. Consequently, few studies have ever tried to evaluate the noise reduction effects of drainage asphalt pavement when it is used as a secondary step to deal with noise pollution problems at sites where noise barriers have already been installed as the primary step. Observation data have shown that where noise barriers are installed, the effect of low-noise pavements is lessened to a great extent, compared with that of low-noise pavements installed in a section without noise barriers. To explore such superficially contradictory data and clarify the reasons behind them, we carried out a laboratory scale-model test and in-situ measurement. It was demonstrated that the low-noise pavement can reduce noise levels in a high frequency band, and noise barriers produce diffraction attenuation in a high frequency band. However, it was found that because of the disturbing influence of a noise level in a low-frequency band, the two effects cannot simply be combined to produce an enhanced effect. This was found to make low-noise pavements less effective where noise barriers have already been installed. (a) For the covering entry of this conference, please see IRRD 895316.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0478105789
• Corporate Authors:

  TRANSIT NEW ZEALAND

  PO BOX 5084, LAMBTON QUAY
  WELLINGTON,   New Zealand 
• Authors:
  • Yamamoto, M
  • MATSUMOTO, K
  • Miyama, T
• Publication Date: 1998

Language

• English

Media Info

• Pagination: p. 397-9
• Serial:
  • ROAD ENGINEERING ASSOCIATION OF ASIA AND AUSTRALASIA (REAAA), CONFERENCE, 9TH, 1998, WELLINGTON, NEW ZEALAND, VOL 1
  • Publisher: TRANSIT NEW ZEALAND

Subject/Index Terms

• TRT Terms: Conferences; Mathematical models; Noise; Noise barriers; Pavement design; Pavements; Vehicles
• ITRD Terms: 8525: Conference; 6473: Mathematical model; 2492: Noise; 2886: Noise barrier; 2955: Pavement; 3055: Pavement design; 1255: Vehicle
• Subject Areas: Environment; Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00761625
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0-478-10578-9
• Files: ITRD, ATRI
• Created Date: Apr 6 1999 12:00AM