Patent ID: 6195442
Filing Date: 2001-02-27
Classification: H04R

Abstract:
A passive device for attenuating structural vibrations of a flexible structure surrounding a cavity while simultaneously providing acoustic dissipation to the interior volume of the cavity, said device comprising;(a) a loudspeaker comprised of a speaker basket enclosing a voice coil and a magnet in its base section and further enclosing a diaphragm, spider, and surround in its conical section;(b) a base structure rigidly attached to said flexible structure;(c) a base suspension structure connecting the base section of said speaker basket to said base structure, whereby stiffness and damping attributes of said base suspension structure cause vibrations of said flexible structure to be absorbed;(d) a shunting resistor connected to the voice coil of said loudspeaker that allows the damping characteristics of the mechanical-acoustic interface of said loudspeaker to be varied to achieve optimum coupling and acoustic dissipation within the interior volume of said cavity.