Download presentation

Presentation is loading. Please wait.

Published byIsaiah McHugh Modified over 3 years ago

1
Reverberation time

2
Reverberation time (1) Lets consider a room containing an active sound source, and lets abruptly interrupt the emission of sound energy. We define as reverberation time RT (s) of an environment, the time necessary for the sound energy density to decrease to a millionth (60 dB) of the value it had before the source was switched off. Sound energy density Steady-state sound energy density Relative sound pressure level (dB)

3
Reverberation time (2)

4
Lp (dB) Time (s) 45 dB ISO 3382 - 2011 -5 dB -25 dB T 20 T20-5 / -25 (*3) T30-5 / -35 (*2) T10 (unused)-5 / -15 (*6) EDT (early decay time)0 / -10

5
Sabines Formula (3) If the environment is perfectly reverberant the value of the reverberation time is the same in all points and is (s) where V is the volume of the environment. This relation is known as Sabines formula. By measuring the reverberation time, it is possible to determine: A= S equivalent area of acoustic absorption

6
Sabines Formula Substituting in the critical distance formula:

Similar presentations

OK

Formula Ratio Proportion Percent of change Weighted Average Equivalent Equations Solve an Equation Multistep Equations identify " And in the end it's not.

Formula Ratio Proportion Percent of change Weighted Average Equivalent Equations Solve an Equation Multistep Equations identify " And in the end it's not.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on index of industrial production Ppt on face recognition technology using matlab Ppt on switching networks Ppt on political parties and electoral process in nigeria Ppt on conservation of wildlife and natural vegetation regions Computer lab rules elementary ppt on cells Ppt on indian railways history Run ppt on tv Ppt on value stream mapping in lean manufacturing Doc convert to ppt online shopping