Title:
AUDIO DEVICES WITH ELECTROACTIVE POLYMER ACTUATORS NOISE CANCELLATION
Document Type and Number:
WIPO Patent Application WO/2014/100573
Kind Code:
A3
Abstract:
A noise canceling system and method for an over-the-ear headphone is provided. The system and method provide a microphone configured to detect a first acoustic signal generated by a source external to the headphone and to produce a first electrical signal corresponding to the first acoustic signal, the first electrical signal having an amplitude, frequency, and phase representative of the first acoustic signal, An electroactive polymer actuator is electrically coupled to the microphone and configured to receive a second electrical signal having an amplitude and frequency substantially equal to the amplitude and frequency of the first electrical signal and a phase that is 180 degrees out-of-phase with the first electrical signal. The electroactive polymer actuator is configured to move in response to the second electrical signal and produce a second acoustic signal having an amplitude and frequency substantially equal to the first acoustic signal and a phase that is about. 180 degrees out-of-phase with the first acoustic signal.
Inventors:
HITCHCOCK ROGER N (US)
HUMPHREYS DAVID W (US)
MUIR ARTHUR H (US)
ZARRABI ALIREZA (US)
HUMPHREYS DAVID W (US)
MUIR ARTHUR H (US)
ZARRABI ALIREZA (US)
Application Number:
PCT/US2013/076893
Publication Date:
August 14, 2014
Filing Date:
December 20, 2013
Export Citation:
Assignee:
BAYER MATERIALSCIENCE AG (DE)
International Classes:
H04R1/10; H04R19/02; A61F11/14; G10K11/178; H04R5/033
Domestic Patent References:
| WO2012173669A2 | 2012-12-20 | |||
| WO2012099854A1 | 2012-07-26 |
Foreign References:
| JP2008141380A | 2008-06-19 | |||
| US20070200468A1 | 2007-08-30 | |||
| EP1158488A2 | 2001-11-28 |
Attorney, Agent or Firm:
BROWN, N., Denise et al. (100 Bayer RoadPittsburgh, PA, US)
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