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Title: | On tuning a reactive silencer by varying the position of an internal membrane |
Authors: | Lawrie, JB Guled, IMM |
Keywords: | Reactive silencer;Membrane boundary;Non-standard orthogonality relation;Mode-matching method;HVAC ducts |
Issue Date: | 2006 |
Publisher: | Acoustical Society of America |
Citation: | The Journal of the Acoustical Society of America. 120 (2) 780–790. |
Abstract: | A mode-matching method is used to investigate the performance of a two-dimensional, modified reactive silencer. The modification takes the form of a membrane which is attached to the internal walls of the expansion chamber parallel to the axis of the inlet/outlet ducts. The height of the membrane above the level of the inlet/outlet ducts can be varied and, by this means, the device is tuned. It is shown that the stopband produced by the silencer can be broadened and/or shifted depending upon the height to which the membrane is raised. Attention is focused on the efficiency of the device at low-frequencies - the regime where dissipative silencers are usually least effective. The potential use of the device as a component in a hybrid silencer for heating ventilation and air-conditioning (HVAC) ducting systems is discussed. |
URI: | http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JASMAN000120000002000780000001&idtype=cvips&gifs=yes http://bura.brunel.ac.uk/handle/2438/3448 |
DOI: | http://dx.doi.org/10.1121/1.2213571 |
Appears in Collections: | Publications Dept of Mathematics Research Papers Mathematical Sciences |
Files in This Item:
File | Description | Size | Format | |
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On tuning a reactive silencer by varying the position of an internal membrane.pdf | 659.93 kB | Adobe PDF | View/Open |
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