SC310
User’s Manual
91
below the initial level, until a level 35 dB lower than the initial one.
T
20
Is the time in seconds that is required for the sound pressure level to
decreases 60 dB, calculated on a line from a lineal regression by least
squares approximation of a decay curve measured from a 5 dB level
below the initial level, until a level 25 dB lower than the initial one.
The reverberation time of a room is one of the most important parameters
to evaluate its acoustics properties. Its measurement has important
applications on the field of noise control in rooms, Concert halls and
Lecture rooms. The reverberation time measurement is essential for
calculation of the acoustic insulation in buildings and of building elements,
and for the measurement of absorption in reverberant room.
The reverberation time parameter is defined in the ISO 3382 International
Standard.