Low f RT60 data

[ordinateur]

Hey guys,

does somebody know if it's possible to get RT60 data lower than 50 Hz?

Best

 

[John Mulcahy]

No, that's the lower limit for RT60 per ISO3382, and even then it is only meaningful in very large spaces. To look at behaviour at lower frequencies you can use the waterfall, spectral decay or RT60 decay graphs.

 

[ordinateur]

Sad! I need to export measured reverberation times to then process them into an absorption coefficient. And I am interested in very low frequencies.

 

[Nick Whitaker]

Hi, John is totally correct about the LF reverberation measurements - particularly in typical room sizes.

However, may I suggest a really useful feature which would really aid RT measurements, particularly the lower frequency measurements:
- Averaging a number of selected RT measurements in (OVERLAY maybe?)- to save as new file to export.
A straightforaward linear average in each frequency band, Standard deviation would be nice.

Nick

 

[John Mulcahy]

So useful it is in the V5.20.14 early access build as an "Export the average" button in the RT60 overlay graph controls.

 

[Nick Whitaker]

Ok John - one step ahead as usual! I’ll check it out. Best wishes, Nick