Measuring absorption below 100Hz with a particle velocity-pressure sensor

Conference paper

Shearer, DJ and Dance, S (2016). Measuring absorption below 100Hz with a particle velocity-pressure sensor. INTER-NOISE and NOISE-CON Congress and Conference Proceedings,. Hamburg, Germany 21 - 24 Aug 2016 pp. 3678-3688
AuthorsShearer, DJ and Dance, S
TypeConference paper
Abstract

© 2016, German Acoustical Society (DEGA). All rights reserved.Absorption is a difficult quantity to measure. The standards based on reverberation chamber measurements are limited to those above 100 Hz. Those based on commercially available impedance tubes are limited to 63 Hz and above. The Microflown impedance gun offers a newer approach to the measurement of absorption coefficients, but is limited to 300-8000 Hz in its commercial form. An extension to the commercial instrumentation to lower the operational range to 40 Hz is proposed. Measurements have been undertaken of dissipative type absorbers and panel absorbers to determine if this method can be used in the 40-100 Hz range. Results are reported and discussed along with the uncertainty in the measurement.

Year2016
JournalProceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future
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Print21 Aug 2016
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Deposited22 Aug 2017
Accepted21 Jul 2016
Page range3678-3688
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