Challenges with the active sound insulation of windows

Davy, J 2001, 'Challenges with the active sound insulation of windows', in Acoustics 2001 Australian Acoustical Society Annual Conference Noise and Vibration Policy - The Way Forward?, Canberra, Australia, 21-23 November 2001.


Document type: Conference Paper
Collection: Conference Papers

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Title Challenges with the active sound insulation of windows
Author(s) Davy, J
Year 2001
Conference name Acoustics 2001 Australian Acoustical Society Annual Conference Noise and Vibration Policy - The Way Forward?
Conference location Canberra, Australia
Conference dates 21-23 November 2001
Proceedings title Acoustics 2001 Australian Acoustical Society Annual Conference Noise and Vibration Policy - The Way Forward?
Publisher Australian Acoustical Society
Place of publication Darlinghurst, Australia
Abstract CSIRO Building, Construction and Engineering has conducted research on the active attenuation of windows for the last three years. The initial idea was to use piezo-electric film adhered to both sides of a single sheet of glass. The polyvinylidene fluoride (PVDF) pieze-electric film is clear and CSIRO Telecommunications and Industrial Physics successfully deposited experimental clear electrodes on a small sample of PVDF film. Unfortunately the sound levels that could be cancelled were not high enough to justify the commercial cost. Experimentation was then switched to double-glazed windows whose cavity was driven by a horn loudspeaker driver unit. The sound levels that could be cancelled were sufficiently high. Successful feed forward control of a periodic signal was achieved using software from the Department of Mechanical Engineering at the University of Adelaide. Unfortunately, no feed forward control achieved with random noise or traffic noise. Analogue feedback control was then used with random noise and gave some attenuation at some frequencies. It was not possible to obtain broadband attenuation.
Subjects Acoustics and Acoustical Devices; Waves
Copyright notice © Australian Acoustical Society 2001
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