Patent ID: 8103024

Claim:
A door, comprising: a door frame; and a door leaf that swings on hinges in the door frame, with a front and a rear cover panel, and with at least one transducer device mounted therein, where the door leaf acts as a loudspeaker and includes a stiff, light structural part that maintains fed-in vibrational energy and by flexural waves propagates this energy in at least one active surface perpendicular to its thickness to distribute resonance mode vibration components over at least one surface, which has specified, preferred locations or sites within it for transducer devices, which are entirely and exclusively affixed on the structural part at one of the locations or sites to set the structural part into vibration and to allow it to resonate, thus creating an acoustic radiator that delivers an acoustic output signal when it vibrates in resonance, the front and/or the rear cover panel of the door leaf being part of the stiff, light structural component, where the signals are conducted from the door frame to the door leaf over at least one hinge.