Attenborough, Keith; Bashir, Imran; Taherzadeh, Shahram and Hill, Toby
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To predict the acoustical effects of green roof structures it is necessary to be able to model the acoustical properties of their materials including gravel. For time domain calculations it is convenient to use the phenomenological model due to Zwikker and Kosten. However this phenomenological model is related to a low frequency/high flow resistivity approximation of more ‘exact’ identical pore models. The results of fitting predictions to short range level difference data and to impedance data for gravel indicate that the Zwikker and Kosten model does not perform as well as other models for low flow resistivity surfaces. For frequency domain calculations of sound propagation over extensive green roofs other models should be more accurate. For time domain calculations use of a two-parameter version of a relaxation model is recommended.
|Item Type:||Conference Item|
|Copyright Holders:||European Acoustics Association|
|Project Funding Details:||
|Extra Information:||Published in Proceedings of Forum Acusticum, 2011/Danish Acoustical Society (editors). Published by EAA (European Acoustics Association), 2011, pp 863-892. ISBN (Electronic)9788469415207, ISSN (Electronic) 2221-3767|
|Academic Unit/Department:||Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
|Depositing User:||Toby Hill|
|Date Deposited:||01 Nov 2011 16:06|
|Last Modified:||26 Nov 2014 16:31|
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