Noise characterization and attenuation using linear predictive coding
First Claim
1. A method of operating a hearing assistance device, the method comprising:
- receiving an audio signal using a microphone of the hearing assistance device;
identifying and isolating a transient in the audio signal using at least a calculated dynamic threshold value and a pre-set threshold value;
using linear predictive coding (LPC) to isolate speech segments and non-speech segments of the transient in the audio signal; and
attenuating the non-speech segments of the transient to reduce annoyance of noise and maintain audibility of perceptually important transients in speech, wherein the calculated dynamic threshold value and the pre-set threshold value are used to set attenuation gain value.
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Accused Products
Abstract
Disclosed herein, among other things, are apparatus and methods for noise characterization and attenuation for hearing assistance devices. In various embodiments, a method of operating a hearing assistance device includes receiving an audio signal using a microphone of the hearing assistance device and identifying a transient in the audio signal. Linear predictive coding (LPC) is used to isolate speech segments and non-speech segments of the transient and fluctuating noise, and the non-speech segments of the transient and fluctuating noise are attenuated to reduce annoyance of the noise and maintain audibility of perceptually important transients in speech.
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Citations
20 Claims
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1. A method of operating a hearing assistance device, the method comprising:
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receiving an audio signal using a microphone of the hearing assistance device; identifying and isolating a transient in the audio signal using at least a calculated dynamic threshold value and a pre-set threshold value; using linear predictive coding (LPC) to isolate speech segments and non-speech segments of the transient in the audio signal; and attenuating the non-speech segments of the transient to reduce annoyance of noise and maintain audibility of perceptually important transients in speech, wherein the calculated dynamic threshold value and the pre-set threshold value are used to set attenuation gain value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A hearing assistance device, comprising:
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a microphone configured to receive audio signals; and a processor configured to process the audio signals to correct for a hearing impairment of a wearer, the processor further configured to; identify and isolate a transient in the audio signal using at least a calculated dynamic threshold value and a pre-set threshold value; use linear predictive coding (LPC) to isolate speech segments and non-speech segments of the transient in the audio signal; and attenuate the non-speech segments of the transient to reduce annoyance of noise and maintain audibility of perceptually important transients in speech, wherein the calculated dynamic threshold value and the pre-set threshold value are used to set attenuation gain value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification