Method and device for background mitigation
First Claim
Patent Images
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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Abstract
An earpiece includes an Ambient Sound Microphone (ASM) configured to measure a background noise signal, an Ear Canal Receiver (ECR) configured to deliver audio to an ear canal, and an optional Ear Canal Microphone (ECM) configured to convert an internal sound within an ear canal of a user to an internal sound signal, and a processor operatively coupled to the ASM, the ECR and optionally the ECM. Note, internal sounds can also include residual background noise related to ambient sounds in the environment. The processor is configured to maintain a natural audio level based on a combined measurement of the background noise signal and the internal sound signal.
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Citations
18 Claims
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1. An earpiece, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9)
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8. An earpiece, comprising:
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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 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 signa; estimates a sensitivity of the ASM and the ECM; and updates a residual background noise signal based on characteristics of the sensitivity.
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10. A method for audio processing, the method comprising the steps of:
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delivering audio to an ear canal using an ear canal receiver; estimating a residual background noise level within the ear canal using an ambient microphone or an ear canal microphone; adjusting the audio based on characteristics of the residual background noise level to maintain a natural audio lever; determining a first sensitivity of the ambient sound microphone and a second sensitivity of the ear canal microphone; and updating the residual background noise level based on characteristics of the first and second sensitivity. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification