Flatphone is an ultra directional flat audio panel, which makes it possible to send a sound or an audio message in a very precise and clear way, on a clearly defined and delimited area, even if it is located dozens of meters away.
The panels are extremely directive. The directivity is a function of the frequency but in general one can state that Flatphone panels (600*600mm size) have directivity of 4x4 when comparing to traditional dynamic loudspeaker elements. Because of the directivity the output SPL level is strong and smooth even over long distances.