The formula for calculating ADM for the farthest viewer is?
FV=(IH/IR) x 3438
A simplified formula for discovering frequencies where room modes will be present is as follows:
3 * (Velocity of sound) / RSD = Hz
Velocity of Sound = 1130 fps
RSD = rooms smallest dimension
Calculate room mode for a room that is 12 x 14 x 16
282.5 Hz
Calculate room mode for a room that is 8 x 12 x 11
423.75