bert stoltenborg wrote:In stead of slanting the ceiling you should use the space that's now wasted to get a bigger room.
We-need-a-bigger-room.
nosfoe wrote:
I am really curious how the huge chunk of wool in the top will affect the modes in the room. Everest writes about the original 'bass traps', holes in the ground or walls with a depth of a quarter wavelenght of the frequency to be absorbed, with porous absorbption in it. Since the pressure of at the entrance to the trap is at zero (at the design frequency) it should suck in more sound energy from surrounding areas. I imagine the huge ceiling trap might act like that and have an effect on the whole room. Of course some other treatment will be applied to the walls for the higher frequencies. Any thoughts if this will absorb enough modal ringing in the whole room?
BengAT wrote:if you are using wool or any porous absorber then you dont want it at the wall.. its doesn't rely on sound pressure but the particle velocity so you want it where the maximum velocity is seen, its minimum is at the wall so you need to place it at least a 1/4 wavelength away from the wall in order to ensure maximum velocity at the surface. The reason you use velocity is because they absorb through viscous losses in the pores so you need maximum sound movement.
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