On the connection between energy velocity, reverberation time and angular momentum (Articolo in rivista)

Type
Label
  • On the connection between energy velocity, reverberation time and angular momentum (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
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  • 10.1016/j.jsv.2009.10.011 (literal)
Alternative label
  • Domenico Stanzial (a), Giuliano Schiffrer (b) (2009)
    On the connection between energy velocity, reverberation time and angular momentum
    in Journal of sound and vibration
    (literal)
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  • Domenico Stanzial (a), Giuliano Schiffrer (b) (literal)
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  • Article history: Received 7 November 2008 Received in revised form 10 July 2009 Accepted 8 October 2009 Handling Editor: Y. Auregan Available online 29 October 2009 (literal)
Rivista
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  • (a) Italian National Research Council, Imamoter Institute, Physics Department, University of Ferrara, Room G115, v. Saragat 1, I-44100 Ferrara, Italy (b) University of Ferrara, Physics Department, v. Saragat 1, I-44100 Ferrara, Italy (literal)
Titolo
  • On the connection between energy velocity, reverberation time and angular momentum (literal)
Abstract
  • The decay of a steady acoustic field in an enclosure is studied both theoretically and experimentally. Our main result is that the initial part of any local sound decay is driven by an exponential function of time whose rate constant is equal in modulus to the inverse of the mean energy velocity divergence. This is empirically demonstrated by experimental analysis of both 1-D and 3-D case studies, thus showing that the reverberation time is strictly connected with the sound energy velocity field and can be determined from its differential properties. A further property of the mean energy velocity is found: it is related not only with the reverberation time, but also with the angular momentum density and with the non-uniform distribution of energy. (c) 2009 Elsevier Ltd. All rights reserved. (literal)
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