Yes, the comment about the 20Hz note is nonsense. The wave may not form, but the pressure change will be sensed as though bass waves are propagating through the room.
My Stax Omega II headphones have amazingly deep bass response. Given the size of the "room" I should hear only upper midrange on up if the space between the driver and my eardrum had to be at least as long as a full wavelength for a particular pitch to be audible.
My Stax Omega II headphones have amazingly deep bass response. Given the size of the "room" I should hear only upper midrange on up if the space between the driver and my eardrum had to be at least as long as a full wavelength for a particular pitch to be audible.