Patent ID: 9232305
Filing Date: 2016-01-05
CPC Classification: H04R

Claim Text:
1. An acoustic transducer comprising: an audio input terminal for receiving an input audio signal; one or more stationary coils for inducing a magnetic flux path; one or more moving coils coupled to a moving diaphragm, wherein the one or more moving coils are disposed at least partially within the magnetic flux path; a control system coupled to the input terminal and adapted to produce a time-varying stationary coil signal in at least one of the stationary coils and to produce a time-varying moving coil signal in each of the one or more moving coils, and wherein all of the stationary coil signals and the moving coil signals are dependent on the input audio signal, wherein the movement of the diaphragm is in response to the stationary coil signals and the moving coil signal, and wherein the control system includes: