Reverberation time


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reverberation time

[ri‚vər·bə′rā·shən ‚tīm]
(acoustics)
The time in seconds required for the average sound-energy density at a given frequency to reduce to one-millionth of its initial steady-state value after the sound source has been stopped; this corresponds to a decrease of 60 decibels.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Reverberation time

The amount of time it takes for sound to decay 60 decibels in a given space. It is a function of room volume and amount of sound absorption provided by surface finishes in the room. Optimum levels are determined based on room volume and space usage.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

reverberation time

A measure of reverberation in an enclosed space; the time required for sound-pressure level to decrease 60 dB after the source has stopped.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Observation of the architectural structure revealed a considerable influence of the geometrical accordion-like ceiling on subjective perception of the acoustics, and the results of the measurements of the reverberation time [T.sub.30] parameter.
The reverberation time can be split into two parts: early and late reverberation time.
In terms of reverberation time, we observed a clear tendency towards a decrease in values.
Jambrosic, "Reverberation time measuring methods," Journal of Acoustical Society of America, vol.
The reverberation time was reduced by 20% to 50% (Nilsson & Gerhardsson, in press).
Measurement instruments for obtaining noise and reverberation time measurements must meet requirements for Type 1 sound level meter as defined in IEC 616721-1 (10) or the Type 1 specifications as defined in the latest versions of ANSI S1.43, (11) and ANSI S1.11.
The effect of the changes in interior finishes on the acoustical environment was determined by measuring the reverberation time in the ED waiting room before the renovation, at various points during the renovation, and at completion.
By lengthening sound reverberation time, an enclosure can increase the sound impulse duration by three times or more compared to shooting in an unenclosed area.
Each Orcal Canopy is 2.23m2 and provides almost three Sabines of sound absorption at 1kHz, reducing reverberation time and noise level and increasing speech intelligibility.