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US 2014/0112504 A1Published application
Audio driver and method for transforming an electrical signal into air movement
OwnerJens Waaleinventor
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OwnerJens Waaleinventor
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A variant of a planar magnetic transducer for sound and ultrasound reproduction includes a substantially flat coil fixed on a diaphragm. A source of a non-varying magnetic field is disposed on one side of the diaphragm; a thin, electrically conductive, non-magnetic membrane is disposed on the other side. An AC signal in the coil results in diaphragm movement and modulation of the non-varying magnetic field. The modulating field generates a current in the membrane, which, upon further interactions, causes the membrane to move. The two independently moving surfaces, each of which produce sound, together result in an unusually flat SPL/frequency response, with very low narrow-band intensity variation and distortion. The forces acting on the moving planes are substantially uniformly distributed on active parts and the force per unit area is high. In embodiments directed to reproducing sound in a limited frequency band, the driver can be very efficient.
An apparatus including a first driver that transforms an electrical signal into air movement, wherein the first driver comprises:
The apparatus of claim 8 and further wherein, when the first driver is in a quiescent state, the second movable surface is not parallel to the first movable surface such that the second gap has a non-uniform size.
The apparatus of claim 11 and further comprising a second driver, wherein the second driver is a dynamic driver.
An apparatus including a driver that transforms an electrical signal into air movement, wherein the driver comprises:
A method for transforming an electrical signal into air movement, the method comprising:
Dependencies are inferred from the claim text.