System and method thereof
AssigneexMEMS Labs, Inc.
InventorsJemm Yue Liang, Hsi-Sheng Chen
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Abstract
A system, disposed within a wearable hearing device, includes a sound producing device (SPD) driven by a driving voltage, a first sound sensing device, and a subtraction circuit. The first sound sensing device is configured to sense a combined sound pressure produced at least by the SPD and generate a sensed signal accordingly. The subtraction circuit has a first input terminal, a second input terminal, and a first output terminal. The first input terminal is coupled to the first sound sensing device, and the first output terminal is coupled to the SPD. A first phase delay between the driving voltage and the sensed signal is less than 60°.
Claims28
A system, disposed within a wearable hearing device, comprising:
- a sound producing device, abbreviated to SPD, driven by a driving voltage;
- a first sound sensing device, configured to sense a combined sound pressure produced at least by the SPD and generate a sensed signal accordingly;
- and
- a subtraction circuit, having a first input terminal, a second input terminal, and a first output terminal, wherein the first input terminal is coupled to the first sound sensing device, the first output terminal is coupled to the SPD;
- wherein the SPD, the first sound sensing device, and the subtraction circuit constitute a feedback loop;
- wherein a first phase delay between the driving voltage and the sensed signal is less than 60°, wherein a third phase delay from the driving voltage being applied to the SPD to a produced sound being produced by the SPD corresponding to the driving voltage is less than 30°.
A method, comprising:
- sensing, by a first sound sensing device, a combined sound pressure produced at least by a sound producing device, abbreviated to SPD and producing, by the first sound sensing device, a sensed signal according to the combined sound pressure;
- deducting a first signal corresponding to the combined sound pressure from an input audio signal to obtain a difference signal, wherein the first signal is generated according to the sensed signal;
- obtaining a driving voltage according to the difference signal;
- and producing, by the SPD, a produced sound according to the driving voltage;
- wherein a first phase delay between the driving voltage and the sensed signal is less than 60°, wherein a third phase delay from the driving voltage being applied to the SPD to a produced sound being produced by the SPD corresponding to the driving voltage is less than 30°.
A system, disposed within a wearable hearing device, comprising:
- a sound producing device, abbreviated to SPD, driven by a driving voltage;
- a first sound sensing device, configured to sense a combined sound pressure produced at least by the SPI) and generate a sensed signal accordingly;
- and
- a subtraction circuit, having a first input terminal, a second input terminal, and a first output terminal, wherein the first input terminal is coupled to the first sound sensing device, the first output terminal is coupled to the SN);
- wherein the SPD, the first sound sensing device, and the subtraction circuit constitute a feedback loop;
- wherein a first phase delay between the driving voltage and the sensed signal is less than 60°, wherein a second phase delay from the combined sound pressure impinging upon the first sound sensing device to the sensed signal being generated by the first sound sensing device corresponding to the combined sound pressure is less than 30°.
A method, comprising:
- sensing, by a first sound sensing device, a combined sound pressure produced at least by a sound producing device, abbreviated to SN) and producing, by the first sound sensing device,
- a sensed signal according to the combined sound pressure;
- deducting a first signal corresponding to the combined sound pressure from an input audio signal to obtain a difference signal, wherein the first signal is generated according to the sensed signal;
- obtaining a driving voltage according to the difference signal;
- and producing, by the SN), a produced sound according to the driving voltage;
- wherein a first phase delay between the driving voltage and the sensed signal is less than 60°,
- wherein a second phase delay from the combined sound pressure impinging upon the first sound sensing device to the sensed signal being generated by the first sound sensing device corresponding to the combined sound pressure is less than 30°.
Dependencies are inferred from the claim text.