2) Loudspeaker system and microphone lying on the ground
The loudspeaker must be tilted to point the microphone, that should be stricly in contact with the
floor. The floor should be very reflecting (smooth), especially beneath the mic: a fine metal sheet
under the mic can be useful for this purpose.
As the picture below shows, in this measurement setup a lower room height is required with respect
to the preceeding scenario, so it can be used when the room height is less than 4m.
