Hearing aid compatible audio device with acoustic noise cancellation
First Claim
1. A mobile phone, comprising:
- mobile phone network communications circuitry to generate a downlink audio signal;
an earpiece speaker having an input to receive the downlink audio signal;
a hearing aid compatible (HAC) radiator having an input to receive the downlink audio signal;
active noise cancellation (ANC) circuitry to generate an anti-noise signal to control ambient acoustic noise;
a signal generator to generate an inverse anti-noise signal that is configured to cancel the anti-noise signal;
a first driver to drive the earpiece speaker based on the downlink audio signal and the anti-noise signal; and
a second driver to drive the HAC radiator based on the downlink audio signal and the inverse anti-noise signal.
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Accused Products
Abstract
A portable audio device, which includes active noise cancellation circuitry, a hearing aid compliant magnetic radiator, and a speaker/earpiece, is surrounded by ambient acoustic noise. The active noise cancellation circuitry provides an anti-noise signal at an input of the speaker to control/reduce the ambient acoustic noise outside of the device. In addition, the active noise cancellation circuitry provides an inverse anti-noise signal to an input of the magnetic radiator. The magnetic fields produced by the speaker driven by the anti-noise signal and the magnetic radiator driven by the inverse anti-noise signal cancel each other out through phase cancellation such that a hearing aid using a telecoil coupled to the audio device does not produce significant audio waves based on either of these signals. Other embodiments are also described.
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Citations
20 Claims
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1. A mobile phone, comprising:
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mobile phone network communications circuitry to generate a downlink audio signal; an earpiece speaker having an input to receive the downlink audio signal; a hearing aid compatible (HAC) radiator having an input to receive the downlink audio signal; active noise cancellation (ANC) circuitry to generate an anti-noise signal to control ambient acoustic noise; a signal generator to generate an inverse anti-noise signal that is configured to cancel the anti-noise signal; a first driver to drive the earpiece speaker based on the downlink audio signal and the anti-noise signal; and a second driver to drive the HAC radiator based on the downlink audio signal and the inverse anti-noise signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. For a mobile phone having an earpiece speaker and a hearing aid compatible (HAC) radiator, a method comprising:
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receiving a downlink audio signal; generating an anti-noise signal to control ambient acoustic noise; generating an inverse anti-noise signal that is configured to cancel the anti-noise signal; generating a first signal based on the downlink audio signal and the anti-noise signal to drive the earpiece speaker; and generating a second signal based on the downlink audio signal and the inverse anti-noise signal to drive the HAC radiator. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification