The reverberation time of a site
is defined as the time required for the level of an audio signal, whose
emission is interrupted, falling 60 dB with respect to the original level.
Depending on the type of places, the reverberation time can vary from tenths of
a second (enclosures acoustically "dead") and several seconds (too
local "living"). For playback of speech with high intelligibility is
necessary to choose a short reverberation time, for music playback is preferred
reverberation time increased, therefore the successive reflections enrich the
tonality of the sound. For this reason special devices are used which are
discussed below (echoes and reverbs) with which you try to give the sound of
the reverb necessary to obtain in local poor acoustics of a quality equivalent
to that which would be achieved in more suitable places.
1)Pioneer
Reverberation Amplifier SR-9. 1982.
2) Sansui Reverberation Amplifier RA-500 1977.
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