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Hi

I´ve been advised (in this forum) not to use RT60 (rev times) to calculate reverberation in small rooms. Why is that? Then how can I approach issues regarding reverberation in such rooms? what measurements/calcs?.

International standards for acoustics in classrooms (the topic Im dealing with now) state the reverberation times should be measured in this and that way and calculated with Sabine´s Eq. The average classroom is not that big of a room.

Or is it that the RT60 function in REW is not suitable for small rooms?

Thanks a lot

SERGIO
 

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Then how can I approach issues regarding reverberation in such rooms? what measurements/calcs?.
RT60 results aren't meaningful in small rooms (less than a gym or church), and are only meaningful when using a full range speaker.

For low frequencies (<200Hz) use the waterfall and decay plots.

For higher frequencies (>200Hz) use ETC.

brucek
 

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Energy-Time Curve. It's a function of REW. It will display your reflections in time from the main stimulus. REW has a nice tool to display distance, so you don't have to calculate it.

brucek
 
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