The insertion loss of thick barriers with rectangular and circular vertical edges

K. E. Piippo, Shiu Keung Tang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A model study of a thick barrier of finite length on a hard reflecting ground is presented. One of the vertical edges is isolated so diffraction only occurs from the top edge and one of the side edges. The reference case is when the side edge angle is 90° (rectangular edge) which is compared to several cases with increasing angle from 90° to 180° (circular edge). In this paper the reference case is presented and compared with the 180° case. The measurements were conducted in a semi-anechoic chamber using a line source for the frequency range 250 Hz to 20 kHz. The barrier thickness was 150 mm which corresponds to a characteristic frequency of about 2 kHz. The measurement results show that the insertion loss is basically broadband. It increases with frequency and the rate of increase is relatively rapid at 2 kHz which is the characteristic frequency of the edge. However, there is a dip in the insertion loss at about 8 kHz for the circular edge.
Original languageEnglish
Title of host publication20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
Pages1646-1649
Number of pages4
Volume2
Publication statusPublished - 1 Dec 2010
Event20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW, Australia
Duration: 23 Aug 201027 Aug 2010

Conference

Conference20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
CountryAustralia
CitySydney, NSW
Period23/08/1027/08/10

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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