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Method and device for background mitigation

  • US 9,456,268 B2
  • Filed: 04/07/2014
  • Issued: 09/27/2016
  • Est. Priority Date: 12/31/2006
  • Status: Active Grant
First Claim
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1. An earpiece, comprising:

  • an Ambient Sound Microphone (ASM) configured to measure a background noise signal of an ambient field;

    an Ear Canal Receiver (ECR) configured to deliver audio to an ear; and

    a processor operatively coupled to the ASM and the ECR, where the processor is configured to;

    maintain a natural audio level based on a combined measurement of a background noise signal and an internal sound signal;

    determine a residual background noise level within the ear canal based on at least one of the background noise level of the ambient sound or a measured ear canal background noise level within the ear canal using an ear canal microphone;

    determine an ear canal signal to noise ratio (SNR) between the audio content level of the audio and the residual background noise level;

    determine a mismatch between the ear canal SNR and a target SNR; and

    adjust a gain applied to at least one of the audio or the ambient sound based on the mismatch such that an approximately constant SNR is maintained between the audio content level and the residual background noise level within the ear canal.

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