Panel-form loudspeakers with hidden exciters
OwnerAndreas Buosinventor
Life of this patent
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Abstract
A bending wave panel-form loudspeaker comprises a spaced pair of panels supported at their edges and defining between them a shallow sealed fluid cavity. Vibration exciters are disposed in the fluid cavity and are arranged to drive the respective panels. The electrical connections to the exciters are at least partially in antiphase such that the predominant motion of the panels is in phase to provide a degree of dipole radiation property for the loudspeaker. The gap between the panels is in the range 2 to 25 mm such that the shallow cavity provides conditions in which fluid coupling dynamics and behavior is asserted between the pair of panels due to the fluid layer between them.
Claims16
A bending wave panel-form loudspeaker comprising:
- a spaced pair of juxtaposed panels separated by a gap and sealingly supported at their edges to define between them a shallow sealed fluid cavity, each of the panels being capable of sustaining and propagating input vibrational energy by bending waves, and
- at least two vibration exciters in the fluid cavity for driving the panels, each exciter being coupled to a respective panel,
- wherein the electrical connections to the exciters are at least partially in antiphase such that the predominant motion of the panels is in phase to provide a degree of dipole radiation property for the loudspeaker, and
- wherein the gap between the panels is sized such that the shallow cavity provides conditions in which fluid coupling dynamics and behaviour is asserted between the pair of panels due to the fluid layer between them.
A display board and loudspeaker combination comprising:
- a spaced pair of juxtaposed panels separated by a gap and sealingly supported at their edges to define between them a shallow sealed fluid cavity, each of the panels being capable of sustaining and propagating input vibrational energy by bending waves, and the exposed surfaces of the panels being adapted to display information or artwork, and
- at least two vibration exciters in the fluid cavity for driving the panels, each exciter being coupled to a respective panel,
- wherein the electrical connections to the exciters are at least partially in antiphase such that the predominant motion of the panels is in phase to provide a degree of dipole radiation property for the loudspeaker, and
- wherein the gap between the panels is sized such that the shallow cavity provides conditions in which fluid coupling dynamics and behaviour is asserted between the pair of panels due to the fluid layer between them.
Dependencies are inferred from the claim text.