It is critical for architects and specifiers of buildings to get the reverberation time of a space correct. We can measure and predict reverberation time.
Approved Document E of the Building Regulations and Building Bulletin 93 (BB93) for schools require the calculation of reverberation time to ensure stringent limits are met.
Consequence of incorrect reverberation time
If the reverberation time of a space is too long, communication of speech in more confined spaces such as board rooms can be difficult.
The opposite is true of larger spaces such as concert halls where a long reverberation time enhances the music performance.
Measurement of reverberation time
The measurement of the reverberation time of a space can be done using a loudspeaker or an impulsive sound such as that produced by a pistol shot. The measurement can be used to:
- Calculate reverberation time in the common internal parts of buildings containing flats or residential rooms
- Calculate airborne insulation of building elements (ISO 140 3/4)
- Determine optimal speech intelligibility of spaces
Prediction of reverberation time
We are able to predict reverberation time using proprietary acoustics modelling packages or through detailed calculation depending on which is more appropriate.
The reverberation time of a space is determined by its volume and the surface finishes within the space. Hard, reflective surfaces such as glass, marble and concrete lead to long reverberation times and can create unpleasant acoustic environments.