4 manual impulse – Soft dB Opus Suite Building Acoustics Module Reverberation Time ISO 3382 User Manual
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The measurement is saved by clicking the
button. Once complete, the current file
indicator
will display the current file name.
7.4
Manual Impulse
This method evaluates the reverberation time by analysing the noise level time decay occurring after
an impulse. The impulses are produced manually by clapping pieces of wood together or by bursting
a balloon.
Step 1
Software Set-Up
1)
Click the
button on the menu bar to access the setup interface.
2)
Select channel 1, ICP input and ±1,5V on the Input Setup
3)
Select Manual Impulse on the Measurement mode drop down list.
4)
Select the number of Averages you want to perform.
5)
Select the appropriate Trigger Level
5
necessary to detect the noise interruption.
6)
Click OK to return to the main interface.
Step 2
Running the Measurement
1)
Click the
button to launch the measurement process.
2)
The measurement status should go through following steps:
At this point, 1 average iteration is complete and the process is waiting for another average iteration.
5
The trigger level is used to detect the impulse (i.e. if the trigger level is set to 5 dB, an impulse will be detected
when the noise level is 5 dB higher than the floor noise level).
Waiting for stable floor noise
Ready for impulse
You can now generate the impulse
Waiting for stable floor noise
1
2
3
4
Processing
5
Finished
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