SP395 SoundPro Audio Integrator
Form7492
Operation Manual
46
75-85 dB. This should produce a Decay Range reading of at least 26 dB (30dB or greater
is recommended for a more accurate reading). You want the sound as loud as possible,
without damaging your system or overloading the SP395
8.
Run RT60 - Click the Test Control field to display "Run RT60."
The pink noise
generator will cycle on and off as readings are taken. The “Decay Time” field displays the
actual time in milliseconds for the sound field to decay by the Decay range amount. The
RT60 time field shows the extrapolated time for the sound to decay in the room, if a full
60dB decay range were available.
9.
Stop.
To stop the analysis and freeze the current test reading, change the mode from “Run
RT60” to “Stop”.
A full room analysis would involve running this test for all of the octave bands and recording the
results.
Note: When looking at reverb times, keep in mind that low frequency energy can vary quite a bit
and still be inaudible to the human ear. This can cause the results to vary in the lower octaves.
Sources of low-frequency sound include heating and air-conditioning systems, traffic, and even
people walking in other parts of the building.
