Sound transmission through hollow brick structures.

Fringuellino, M and Smith, Sean (1999) Sound transmission through hollow brick structures. Building Accoustics, 6 (3/4). pp. 211-224. ISSN 1351-010X

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Hollow bricks and blocks are one of the most common forms of material used for wall construction found in Central and Southern Europe. The principle purpose of the perforations (holes) is to increase the thermal insulation properties. As a result of these perforations the block gross density is reduced significantly and these block walls have high anisotropy. Consequently, the acoustical insulation properties are influenced detrimentally in comparison to solid blocks. Due to the large thickness of some of these types of hollow block thick wall effects can occur such as bending shear waves and thickness resonances. These further reduce the sound insulation at high frequencies. This paper describes the characteristic features of sound transmission through hollow walls. For this study several different types of wall were built of varying thickness and materials and the sound reduction index was recorded. The effects of additional plaster layers is also discussed. It is suggested that the material properties of the block's complex web structure may strongly influence the sound reduction index at the low and high frequencies.

Item Type: Article
Print ISSN: 1351-010X
Uncontrolled Keywords: hollow bricks; sound insulation; thermal insulation; sound transmission;
University Divisions/Research Centres: Edinburgh Napier University, Institute for Sustainable Construction
Dewey Decimal Subjects: 700 Arts & recreation > 720 Architecture > 729 Design & decoration
Library of Congress Subjects: T Technology > TH Building construction
Item ID: 4793
Depositing User: Mrs Lyn Gibson
Date Deposited: 30 Nov 2011 10:20
Last Modified: 17 Sep 2013 14:27

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