How many source positions? how many measuring positions?

[sergioTOOL]

Hi

Does anybody know how many measuring positions and how many source positions should be used to measure RT60 and freq. response using the sweep sine signal method? I´m using an OMNI-DIRECTIONAL source in a room of around 6x6x4.
I know some may say RT60 is not valid for a room this size, but the standards say I have to measure it and so I will.

thanks for your input.

Sergio

[ratafoin2]

Hello,
if you want to measure RT60 or frequency response in a "small room" (in term of acoustics) you need to have a lot of measurement point , i will say something around 20 to 30 measurement .
In order to differentiate between the modal region and the statisticall region.
Just keep in mind that in a small room wa are not really dealing with a reverberation time but more with modal ringing
hope this help