Noise reduction methodology for wearable devices employing multitude of sensors
First Claim
1. A wearable device for producing noise free communication, the wearable device comprising:
- a housing configured to wear by a user;
an air conduction microphone configured in the housing to receive voice sound of the user;
an accelerometer sensor configured in the housing to receive voice signature;
a battery configured in the housing to power the air conduction microphone and the accelerometer sensor;
a printed circuitry board configured in the housing to receive power from the battery;
a memory unit connected to the printed circuitry board to store plurality of instructions;
a digital signal processor connected to the printed circuitry board to process the stored plurality of instructions, wherein the instructions comprising the steps of;
storing frequency range and other perceptual characteristic information of human voice range in the memory unit;
receiving voice sound and voice signature from the air conduction microphone and the accelerometer sensor respectively;
filtering sound from both the air conduction microphone and the accelerometer sensor to determine different frequency components present in the input from frequency ranges outside the user'"'"'s voice range;
performing equalizing function to balance important frequencies;
detecting the type of noise occurring in the background of the air conduction microphone;
cleaning the air conduction microphone voice sound;
creating a template of the voice signature pattern from the accelerometer sensor;
extracting of the voice signature pattern from the air conduction microphone as per the template to get the voice signature pattern for a pre-determined duration;
raising the same amount of increase in the same frequency range from the air conduction microphone based upon the corresponding band signal level in voice signature from the accelerometer sensor;
cancelling out the inputs from the air conduction microphone for a period where the accelerometer sensor shows no activity; and
blending the filtered signal from the air conduction microphone and the accelerometer sensor into a single voice signal for communication.
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Accused Products
Abstract
Disclosed is a wearable device for producing noise free communication. The wearable device includes a housing configured to wear by a user, an air conduction microphone configured in the housing to receive voice sound of the user, an accelerometer sensor configured in the housing to receive voice signature, a battery configured in the housing to power the air conduction microphone and the accelerometer sensor, a printed circuit board configured in the housing to receive power from the battery, a memory unit connected to the printed circuitry board to store plurality of instructions, and a digital signal processor connected to the printed circuit board to process the stored plurality of instructions. The instructions are programmed to achieve a noise free communication. The voice from both air conduction microphone and the accelerometer sensor are analyzed to filter out noise and resulting in generation of noise free communication.
12 Citations
8 Claims
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1. A wearable device for producing noise free communication, the wearable device comprising:
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a housing configured to wear by a user; an air conduction microphone configured in the housing to receive voice sound of the user; an accelerometer sensor configured in the housing to receive voice signature; a battery configured in the housing to power the air conduction microphone and the accelerometer sensor; a printed circuitry board configured in the housing to receive power from the battery; a memory unit connected to the printed circuitry board to store plurality of instructions; a digital signal processor connected to the printed circuitry board to process the stored plurality of instructions, wherein the instructions comprising the steps of; storing frequency range and other perceptual characteristic information of human voice range in the memory unit; receiving voice sound and voice signature from the air conduction microphone and the accelerometer sensor respectively; filtering sound from both the air conduction microphone and the accelerometer sensor to determine different frequency components present in the input from frequency ranges outside the user'"'"'s voice range; performing equalizing function to balance important frequencies; detecting the type of noise occurring in the background of the air conduction microphone; cleaning the air conduction microphone voice sound; creating a template of the voice signature pattern from the accelerometer sensor; extracting of the voice signature pattern from the air conduction microphone as per the template to get the voice signature pattern for a pre-determined duration; raising the same amount of increase in the same frequency range from the air conduction microphone based upon the corresponding band signal level in voice signature from the accelerometer sensor; cancelling out the inputs from the air conduction microphone for a period where the accelerometer sensor shows no activity; and blending the filtered signal from the air conduction microphone and the accelerometer sensor into a single voice signal for communication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification