Patent ID: 6888946

Claim:
A tweeter comprising: a light, freely carried thin sandwich plate ( 3 , 20 , 39 , 60 ) which can be excited into multiple reflected bending waves; and at least one driver ( 1 , 13 , 14 , 15 , 26 , 27 , 28 , 40 , 41 ) which makes vibrating contact with and excites the sandwich plate ( 3 , 20 , 39 , 60 ), wherein the driver ( 1 , 13 , 14 , 15 , 26 , 27 , 28 , 40 , 41 ) is designed to excite at higher sound frequencies, the sandwich plate ( 3 , 20 , 39 , 60 ) is designed for the propagation of bending waves with low damping, the sandwich plate ( 3 , 20 , 39 , 60 ) is freely supported by holding elements ( 12 , 24 , 25 , 34 , 35 ) with low damping, and the holding elements ( 12 , 24 , 25 , 34 , 35 ) are designed to be low damping at higher sound frequencies, wherein the bending waves have wavelengths which are small with respect to a surface diagonal of the sandwich plate, and wherein the sandwich plate has a bending resonance under a band containing the higher sound frequencies.