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http://dx.doi.org/10.7776/ASK.2009.28.8.781

Selection of Scale Model Materials for Acoustical Evaluation of 1:50 Multipurpose Halls  

Jeon, Jin-Yong (한양대학교 건축공학부)
Kim, Jeong-Jun (한양대학교 건축환경공학과)
Kim, Yong-Hee (한양대학교 건축환경공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.28, no.8, 2009 , pp. 781-789 More about this Journal
Abstract
The absorption coefficients of the materials used in a 1:50 scale model multipurpose hall were measured based on ISO 354 and related laws. The shape and materials for the scale model were evaluated based on reflective surfaces, variable acoustic elements and sound-absorbing quality (125Hz-1kHz average) of seats. The measured average absorption coefficients of audience seats, audience and orchestra were 0.64, 0.74 and 0,45, respectively, which were simulated with the combination of wood, absorption materials and foam board. Various mounting methods for absorption curtain and banner were considered according to the installation methods. The average absorption coefficient was measured as 0.42, 0.47 and 0.45 in the conditions of Type A mounting, E mounting with 0.9 m backing air cavity, and Type G mounting which is suspended at the ceiling, respectively. It was confirmed that the absorption coefficient was increased at low frequency by backing air gap. The finishing material of stage house was an absorption material covered with thin fabric, which aimed average absorption coefficient of 0.68 by using fiber glass board. Each part of the real materials was compared with those of 1:50 scale model and it was found that the absorption characteristics of both cases were similar.
Keywords
Sound Absorption Coefficient; Multi Purpose Hall; Scale Model; Acoustical Design; Variable Acoustics;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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