Ceiling Speaker Systems


Distribution Area for standard Ceiling Speakers

Distribution Area for Loudspeakers, 60 degree x 60 degree
Ceiling Height       3m    3,5m      4m    4,5m      5m    5,5m      6m
Distance between Speakers    1,8m    2,2m      3m    3,6m   4,2m    4,8m    5,4m
Distribution Area     3qm     5qm     9qm    13qm    18qm    23qm    29qm
Distribution Area for Loudspeakers, 90 degree x 90 degree
Ceiling Height      3m    3,5m      4m    4,5m      5m    5,5m      6m
Distance between Speakers      3m      4m      5m      6m      7m      8m      9m
Distribution Area     9qm    16qm    25qm    36qm    49qm    64qm    81qm
Distribution Area for Loudspeakers, 120 degree x 120 degree
Ceiling Height       3m    3,5m      4m    4,5m      5m    5,5m      6m
Distance between Speakers     5,5m      7m     9m    10,5m   12m    14m    16m
Distribution Area     30qm    49qm    81qm    110qm   144qm   196qm   256qm

ceiling height from floor to ceiling
Source: G. Boye, U.F. Herrmann: Handbuch der Elektroakustik


Ceiling Speaker Systems with or without Delay Zones ?

ceiling speaker system

If the distance to the source (talking person or first speaker line ('zero delay') is larger than 5 to 6 times the distance to the ceiling speakers above a listener the delayed system doesn't work:
The level difference between the source signal (first wave front) and the delayed signal is more than 14 dB and the first wave front is not audible anymore (precedence effect).