Magnetic suspension transducer

摘要

A method for operating an acoustic transducer is provided. The acoustic transducer includes a moving element and a fixed element, wherein the moving element is coupled to surrounding air. In the method, a signal-independent magnetic field is generated to urge the moving element into a rest position when no input signal is received; and a force is generated in response to the input signal and applying that force to the moving element to urge the moving element away from the rest position. The moving element is controlled by a combined influence of the signal-independent magnetic field and the signal-dependent force to generate acoustic vibrations in response to an audio input signal.

主权项

1. A method for operating an acoustic transducer, comprising:
providing a moving element within a fixed element, wherein the moving element is coupled to surrounding air and comprises a magnetic material;
generating a signal-independent magnetic field to urge the moving element into a rest position when no input signal is received; andgenerating a signal-dependent force in response to the input signal and applying that signal-dependent force to the moving element to urge the moving element away from the rest position;whereby the moving element is controlled by a combined influence of the signal-independent magnetic field and the signal-dependent force to generate acoustic vibrations in response to an audio input signal;wherein said generating the signal-independent magnetic field comprises surrounding at least a portion of an exterior of the fixed element with a magnetic material; andwherein said generating the force in response to the input signal comprises surrounding at least a portion of an exterior of the fixed element with an electromagnetic coil and sending an electrical signal to the coil.