Patent ID: 8798302

Claim:
A flat panel loudspeaker comprising a housing comprising a front side and a rear side; a high-frequency loudspeaker within the housing; and a mid- or low-frequency loudspeaker arranged so as to emit outwardly away from the rear side of the housing; and a sound conduction configured to conduct sound from the high-frequency loudspeaker via an acoustic aperture within the housing outwards, wherein the acoustic aperture is formed in a lateral side of the housing extending between, and connecting, the front side and the rear side, in form of a series of holes or in form of a slit in the lateral side, wherein a longitudinal extension of the series of holes or the slit extends circumferentially with respect to the front and rear sides and a width of the series of holes or the slit in a thickness direction via which front and rear sides are distanced from each other is smaller than a wavelength of a highest frequency of the sound from the high-frequency loudspeaker so that the sound emitted by the high-frequency loudspeaker is radiated from the acoustic aperture in a plane perpendicular to the longitudinal direction in a nearly equiangular manner so that a perceivable portion of the sound emitted by the high-frequency loudspeaker propagates into a direction into which the front side of the housing faces.