| EPSRC Reference: |
GR/J70437/01 |
| Title: |
CONTROLLING ACOUSTIC MODES IN BUILT SPACES USING ACTIVE SOUND ABSORBER |
| Principal Investigator: |
Darlington, Dr P |
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| Department: |
Applied Acoustics |
| Organisation: |
University of Salford |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
18 April 1994 |
Ends: |
17 April 1996 |
Value (£): |
56,586
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| EPSRC Research Topic Classifications: |
| Building Ops & Management |
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Summary on Grant Application Form |
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This programme will investigate the suppression of low frequency acoustic room modes using active sound absorbers. The ability to remove such resonances from built spaces will lead to advances in architectural acoustics, improving speech intelligibility and providing new noise control measures. The concept of active absorption has been proven in simple experimental environments where levels of sound power absorption have been achieved which would be completely impractical using existing passive techniques.Although theoretical considerations suggest that an optimal active absorber would be very strongly application dependant, the results of initial experiments show that it is possible to build sub-optimal absorbers which can effectively suppress room resonances in areas of low modal density. The proposed investigation is designed to identify (i) the acoustic impedance which should be implemented by the absorbers, (ii) how a number of the absorbers interact and (iii) how they should be distributed. The study will be referenced to the low frequency modes of a room of typical aspect ratio. The findings of the project will enable the development of an absorber for application in enclosed spaces with problematic low frequency acoustics.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.salford.ac.uk |