Patent ID: 6108433
Filing Date: 2000-08-22
Classification: G10K

Abstract:
An ultrasonic emitter device having broad frequency range capacity with relatively large diaphragm displacement compared to typical electrostatic diaphragm movement, said device, comprising:a core member containing means for establishing a variable magnetic field adjacent the core member;a movable diaphragm disposed in tension along the core member and displaced a short separation distance from the core member to allow an intended range of orthogonal displacement of the diaphragm with respect to the core member and within a strong portion of the variable magnetic field; andat least one conductive ring disposed on the movable diaphragm for enabling inductively induced current flow in an orientation which develops a counter, opposing magnetic force which is repelled by the variable magnetic field of the core member at a desired frequency for development of a series of compression waves which may be adjusted to include an ultrasonic frequency range.