Patent ID: 9123323
Filing Date: 2015-09-01
Classification: A61F,G10K,H04R

Abstract:
1. An earpiece comprising: a housing; a magnetic field generator coupled to the housing, where the field generator is configured to generate a magnetic field when a non-zero current passes through the field generator, where the field generator is configured to generate a stable magnetic field and a varying magnetic field; and a field responsive fluid, where the field responsive fluid is within a portion of the housing, where the field responsive fluid is configured to respond only to the magnetic field from the magnetic field generator and to any ambient magnetic field originating from outside of the portion, where the housing is part of the earpiece, and where the earpiece is configured to use the field generator to generate a field, where the field responsive fluid responds to the field, where the response is at least one of increased sound absorption at a first acoustic frequency and generation of an acoustic wave at a second acoustic frequency.