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ISO3382 Noise Method


The ISO3382 Noised Method block determines the reverberation time based on calculations from ISO3382-2 (Acoustics) Measurement of room acoustic parameters โ€” Part 2: Reverberation time in ordinary rooms.

The reverberation time is calculated based on the interrupted noise method where a noise signal is interrupted and forms the rooms decay curve. Using exponential averaging the reverberation time T60, T30, or T20 is calculated.

Fx1MxNReverberation timesNoise [P,pos1]


Noise [P,pos1] is the interrupted noise signal that is M samples long and can be repeated 1 to N times.


Reverberation times is the calculated reverberation times in F bands. Default one band pr octave from 100 Hz to 4000 Hz.


Bands pr. octaveโ˜ 1
Start frequencyโ˜ 100
Stop frequencyโ˜ 4000

Values with โ˜ can receive external input.


Name specifies the name of the block.


Mode specifies which type of reverberation time you want to calculate. You can choose between T60, T30, or T20.

Bands pr. octave#

Bands pr. octave species the number of bands you want to output pr octave.

Start frequency#

Start frequency specifies the frequency which should be in the first band.

Stop frequency#

Stop frequency specifies the frequency which should be in the last band.


Inputs specifies the number of inputs the block requires. Each input is a specific measurement position that are used.