SC310
User’s Manual
79
Reverberation Time mode screen. This mode will be distinguished because the
indication that will appear on the upper right part from the screen.
7.3.4 End the SC310
To switch off the SC310, check there is no measurement in progress ( ) and
press:
7.3.5 SC310 menu
While there is no measurement in progress ( ) it can be accede to the SC310 menu by
pressing:
All the menu options are available.
To turn back to the measurement mode press:
7.4 Measuring the Reverberation Time by octave bands
7.4.1 Measuring the Reverberation Time
The REVERVERATION TIME 1/1 mode of the
SC310
measures simultaneously the
reverberation time (T
20
and T
30
) for all the octave bands (from 63 Hz to 4 kHz ) through the
interrupted noise method.
This method lies in obtaining the sound pressure level decay according to time inside the
room that it is being studied. This decay is obtained exciting the room with random noise of
broadband or of limited bandwidth and recording the decay level of the sound pressure when
making a sudden interruption of the noise emission.
To do this measurement, you will need an omni directional sound pressure source (FPA-120)
to emit a broadband noise (pink noise).
From among the applications of this mode you should point up the measurement of the
reverberation time in rooms, the measurement of the absorption coefficient in reverberant
rooms, the measurement of the acoustic insulation in buildings and of building elements.
7.4.2 Beginning a measurement
First of all, check that is no measurement in progress ( ) . If there is, ( o ), press
to stop it.
Next, switch the SC310 to REVERBERATION TIME 1/1 mode and follow the next steps:
•
Be sure that the noise emission of the sound pressure source is stopped.
