A 20 Hz wavelenth according to this webside http://www.mcsquared.com/wavelength.htm is 56.5' so I am not sure how you arrived at 27.5'. My own room measures only 13' and I have speakers which go down to 33Hz and a sub which goes down to 10 Hz (-3db) and I can assure you I hear well below the 90hz (12.5') wavelength that the room can accomodate.
My sub only switches on when there are signals below 33Hz and as such I can say for certain music (light jazz) its always on while for some (classical) its off except for brief moments, so depends it really depends on the music.
My understanding is that we hear based on vibrations the ear drum picks up and not on wavelength. We can hear in water too or by placing our ears on any medium that will transmit sound like a wall. Take earphones which operates by moving the air in the ear cannel coupled to the ear drum.
The only reason for a large room is that you reduce reflections as a result of being too close to walls. So I don't really see why you would need a huge room to accomodate a 20 Hz wave. Can someone explain this?
My sub only switches on when there are signals below 33Hz and as such I can say for certain music (light jazz) its always on while for some (classical) its off except for brief moments, so depends it really depends on the music.
My understanding is that we hear based on vibrations the ear drum picks up and not on wavelength. We can hear in water too or by placing our ears on any medium that will transmit sound like a wall. Take earphones which operates by moving the air in the ear cannel coupled to the ear drum.
The only reason for a large room is that you reduce reflections as a result of being too close to walls. So I don't really see why you would need a huge room to accomodate a 20 Hz wave. Can someone explain this?