Vehicular loudspeaker system
First Claim
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1. A loudspeaker system comprisinga piezoelectric element subject to displacement by applied electric potential and having a top side, an under side and an outer perimeter;
- a substrate having an upper and lower side, with the upper side of the substrate being joined to the underside of the piezoelectric element;
a diaphragm that is driven by the excited piezoelectric element, said diaphragm being comprised of the headliner of a vehicle;
means to attach the lower side of the substrate directly to the diaphragm; and
means to apply electric potential to the piezoelectric element, wherein said substrate having a larger surface area than the piezoelectric element and having substantially the same rigidity as the piezoelectric element but a greater rigidity than the diaphragm.
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Abstract
An improved loudspeaker system for a passenger vehicle such as an automobile is disclosed. The system comprises a transducer capable of being excited by applied electric potential and electronic means that is electrically connected to the transducer to apply electric potential thereto. It is a feature of the present invention that the diaphragm driven by the excited transducer is comprised of the headliner of the vehicle.
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Citations
4 Claims
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1. A loudspeaker system comprising
a piezoelectric element subject to displacement by applied electric potential and having a top side, an under side and an outer perimeter; -
a substrate having an upper and lower side, with the upper side of the substrate being joined to the underside of the piezoelectric element;
a diaphragm that is driven by the excited piezoelectric element, said diaphragm being comprised of the headliner of a vehicle;
means to attach the lower side of the substrate directly to the diaphragm; and
means to apply electric potential to the piezoelectric element, wherein said substrate having a larger surface area than the piezoelectric element and having substantially the same rigidity as the piezoelectric element but a greater rigidity than the diaphragm. - View Dependent Claims (2, 3, 4)
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Specification