Diffusers question for pros
I am about to build the diffusers for my 2 rooms (live room and drums booth).
Live room is 4,5 m x 7,5 m with 2,5 m height and the booth is 2,5m x 2,5m x 2,5 m . I have on the ceilings in both rooms 7 cm rock wool ( isover ) covered with wood frames with fabric over the frames . I also have the bass traps in every corner in different dimensions and i am about to build some more bass traps.
My plan is to build diffusers 60 cm x 60 cm using this formula ( see the pic.) and try to deal with freq from 500 Hz til 4Khz .
My questions are :
-usually this kind of diffusers are build of wood but i was thinking of building them with styropor , what do you think about it, is it a good idea or should i stay with wood ?
- How many diffusors do i need for this rooms and where should i place them ?