- Patent Title: Determination of environmental effects on electrical load devices
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Application No.: US16130979Application Date: 2018-09-13
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Publication No.: US10433046B2Publication Date: 2019-10-01
- Inventor: A. Martin Mallinson , Robert Lynn Blair , Christian Leth Petersen , Paul Christopher Scowen
- Applicant: ESS Technology, Inc.
- Applicant Address: US CA Milpitas
- Assignee: ESS Technology, Inc.
- Current Assignee: ESS Technology, Inc.
- Current Assignee Address: US CA Milpitas
- Agency: Gard & Kaslow LLP
- Main IPC: H04R1/10
- IPC: H04R1/10 ; H03M1/02 ; H03F3/45

Abstract:
An improved system and method for reducing the ambient noise experienced by a user listening to an earpiece without the use of a microphone is disclosed. An “ambient noise signal” created by the sound pressure wave of the ambient noise acting on the earpiece transducer is obtained. In some embodiments, the ambient noise signal is inverted and fed back, and the inverted signal is added to the intended audio signal being sent to the earpiece so that the ambient noise is cancelled. In other embodiments, a processor receives the ambient noise signal and predicts the modification to the intended audio signal needed to counteract the ambient noise. The ambient noise signal may be obtained by comparing the actual signal across the earpiece transducer to the intended audio signal, or by detecting variations in the current across the transducer from the current generated to drive the transducer.
Public/Granted literature
- US20190116414A1 Determination of Environmental Effects on Electrical Load Devices Public/Granted day:2019-04-18
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