Feedforward-based ANR talk-through
First Claim
1. A method of supporting talk-through audio in a personal ANR device providing feedforward-based ANR within a casing of the personal ANR device, the method comprising:
- configuring a first plurality of filters in a feedforward-based ANR pathway of a first ANR circuit of the personal ANR device with a first set of filter coefficients to provide feedforward-based ANR employing a first feedforward microphone coupled to the first ANR circuit to detect environmental sounds in an environment external to the casing and a first acoustic driver coupled to the first ANR circuit to acoustically output feedforward anti-noise sounds to reduce the environmental sounds within the casing;
awaiting receipt of an indication of a manually-operable control being operated to enable talk-through; and
in response to receiving the indication of the manually-operable control being operated, operating the first plurality of filters to reduce the degree of feedforward-based ANR provided by the first plurality of filters to enable human speech sounds in the environment external to the casing to be conveyed from the first feedforward microphone to the first acoustic driver with less attenuation caused by the provision of feedforward-based ANR by the first plurality of filters.
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Abstract
An ANR circuit, possibly of a personal ANR device, reduces the degree of feedforward-based ANR that it provides in response to receiving an indication of the operation of a manually-operable control. The reduction of degree of feedforward-based ANR may be effected by turning off or otherwise deactivating the provision of feedforward-based ANR, reducing a range of frequencies of environmental noise sounds attenuated by the feedforward-based ANR to provide less attenuation of sounds detected by a feedforward microphone that are in a range of frequencies deemed to be those of human speech, and/or creating a notch in the range of frequencies of environmental noise sounds attenuated by the feedforward-based ANR to provide less attenuation of sounds detected by the feedforward microphone that are in a range of frequencies deemed to be those of human speech.
75 Citations
17 Claims
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1. A method of supporting talk-through audio in a personal ANR device providing feedforward-based ANR within a casing of the personal ANR device, the method comprising:
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configuring a first plurality of filters in a feedforward-based ANR pathway of a first ANR circuit of the personal ANR device with a first set of filter coefficients to provide feedforward-based ANR employing a first feedforward microphone coupled to the first ANR circuit to detect environmental sounds in an environment external to the casing and a first acoustic driver coupled to the first ANR circuit to acoustically output feedforward anti-noise sounds to reduce the environmental sounds within the casing; awaiting receipt of an indication of a manually-operable control being operated to enable talk-through; and in response to receiving the indication of the manually-operable control being operated, operating the first plurality of filters to reduce the degree of feedforward-based ANR provided by the first plurality of filters to enable human speech sounds in the environment external to the casing to be conveyed from the first feedforward microphone to the first acoustic driver with less attenuation caused by the provision of feedforward-based ANR by the first plurality of filters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising an ANR circuit comprising:
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a feedforward-based ANR pathway through which digital data associated with providing feedforward-based ANR flows; an interface to await receipt of an indication of a manually-operable control being operated to enable talk-through; and a first plurality of filters along the feedforward-based ANR pathway configurable with a first set of filter coefficients to cause the first plurality of filters to provide feedforward-based ANR within a casing employing a first feedforward microphone to detect environmental sounds in an environment external to the casing and a first acoustic driver to acoustically output feedforward anti-noise sounds to reduce the environment sounds within the casing, and configurable in response to receiving the indication of the manually-operable control being operated with a second set of filter coefficients to reduce the degree of feedforward-based ANR provided by the first plurality of filters to enable human speech sounds in the environment external to the casing to be conveyed from the first feedforward microphone to the first acoustic driver with less attenuation caused by the provision of feedforward-based ANR by the first plurality of filters. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification