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US 2023/0055722 A1Published application
Noise Control System
AssigneeGoogle Inc.
InventorsGuohua Sun, Jae Lee, Tiantian Xu
Life of this patent
Estimating the term…
Abstract
A hybrid ANC system that can allow a feedback microphone to receive the same external noise as a feedforward microphone. A processor can generate an anti-noise signal based on what both microphones received to cancel a broader range of frequencies of the external noise.
Claims20
An earbud, comprising:
- a housing defining a duct extending from an interior portion of the housing to outside of the housing, the duct configured to allow external noise into the housing with a time delay;
- one or more feedforward microphones configured to receive the external noise;
- one or more feedback microphones in communication with the duct, the one or more feedback microphones being configured to receive the external noise with the time delay;
- and
- a speaker in electrical communication with the one or more feedforward microphones and the one or more feedback microphones, the speaker configured to emit a filtered anti-noise signal based on the external noise received by the one or more feedforward microphones and the external noise received by the one or more feedback microphones with the time delay.
2 more elements
A method, comprising:
- receiving, with one or more feedforward microphones at a first time, external noise from outside of a housing of an electronic device;
- generating, with the one or more processors, a first anti-noise signal based on the external noise received by the one or more feedforward microphones;
- receiving, with one or more feedback microphones at a second time, the external noise, the second time being after the first time;
- generating, with one or more processors, a filtered anti-noise signal based on the first anti-noise signal and the external noise received by the one or more feedback microphones at the second time;
- and
- emitting, with the speaker, the filtered anti-noise signal.
3 more elements
A non-transitory computer-readable medium housed in a computing device storing instructions, which when executed by one or more processors, cause the one or more processors to:
- receive, with one or more feedforward microphones at a first time, external noise from outside of a housing of an electronic device;
- generate, with the one or more processors, a first anti-noise signal based on the external noise received by the one or more feedforward microphones;
- receive, with one or more feedback microphones at a second time, the external noise, the second time being after the first time;
- generate, with one or more processors, a filtered anti-noise signal based on the first anti-noise signal and the external noise received by the one or more feedback microphones at the second time;
- and
- emit, with the speaker, the filtered anti-noise signal.
3 more elements
Dependencies are inferred from the claim text.