Patent ID: 6247551
Filing Date: 2001-06-19
Classification: G10K,H04R

Abstract:
A panel-form loudspeaker comprising:a resonant multi-mode radiator element being a unitary sandwich panel formed of two skins of material with a spacing core of transverse cellular construction, wherein said panel has a quotient T of bending stiffness (B) in Nm, in all orientations, to the cube power of panel mass per unit surface area (.mu.) in kg/m.sup.2 of at least 10 Nm.sup.7 /kg.sup.2 ;a mounting means for supporting the panel in a free undamped manner;and an electromechanical drive means coupled to the panel which serves to excite a multi-modal resonance in the sandwich panel in response to an electrical input within a working frequency band for the loudspeaker.