Dual microphone near field voice enhancement
First Claim
1. A dual microphone near field voice enhancement arrangement in a motor vehicle, the arrangement comprising:
- a seat including a headrest, the headrest having two opposite lateral sides;
two microphones, each said microphone being mounted on a respective one of the two opposite lateral sides of the headrest, each said microphone being configured to produce a respective microphone signal indicative of sounds within a passenger compartment of the motor vehicle; and
an electronic processor communicatively coupled to the microphones and configured to;
receive the microphone signals;
calculate a time delay between the microphone signals;
use the calculated time delay to estimate amplitudes of the microphone signals;
apply a respective time delay to each of the microphone signals based on the calculated time delay to produce two time-aligned signals;
apply a respective gain to each of the time-aligned microphone signals based on the estimated amplitudes to produce two time-aligned and gain corrected signals; and
sum the time-aligned and gain corrected signals.
1 Assignment
0 Petitions
Accused Products
Abstract
A dual microphone near field voice enhancement arrangement in a motor vehicle includes a seat having a headrest with two opposite lateral sides. Each of two microphones is mounted on a respective one of the two opposite lateral sides of the headrest. Each microphone produces a respective microphone signal indicative of sounds within a passenger compartment. An electronic processor receives the microphone signals. The processor calculates a time delay between the microphone signals, and uses the calculated time delay to estimate amplitudes of the microphone signals. The processor applies a respective time delay to each of the microphone signals based on the calculated time delay to produce two time-aligned signals. The processor applies a respective gain to each of the time-aligned microphone signals based on the estimated amplitudes to produce two time-aligned and gain corrected signals. The processor sums the time-aligned and gain corrected signals.
11 Citations
14 Claims
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1. A dual microphone near field voice enhancement arrangement in a motor vehicle, the arrangement comprising:
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a seat including a headrest, the headrest having two opposite lateral sides; two microphones, each said microphone being mounted on a respective one of the two opposite lateral sides of the headrest, each said microphone being configured to produce a respective microphone signal indicative of sounds within a passenger compartment of the motor vehicle; and an electronic processor communicatively coupled to the microphones and configured to; receive the microphone signals; calculate a time delay between the microphone signals; use the calculated time delay to estimate amplitudes of the microphone signals; apply a respective time delay to each of the microphone signals based on the calculated time delay to produce two time-aligned signals; apply a respective gain to each of the time-aligned microphone signals based on the estimated amplitudes to produce two time-aligned and gain corrected signals; and sum the time-aligned and gain corrected signals. - View Dependent Claims (2, 3, 4, 5)
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6. A dual microphone near field voice enhancement method for a motor vehicle, the method comprising:
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providing a seat including a headrest in the motor vehicle, the headrest having two opposite lateral sides; mounting each of two microphones on a respective one of the two opposite lateral sides of the headrest; producing a respective microphone signal from each of the microphones, the microphone signals being indicative of sounds within a passenger compartment of the motor vehicle; calculating a time delay between the microphone signals; using the calculated time delay to estimate amplitudes of the microphone signals; applying a respective time delay to each of the microphone signals based on the calculated time delay to produce two time-aligned signals; applying a respective gain to each of the time-aligned microphone signals based on the estimated amplitudes to produce two time-aligned and gain corrected signals; and summing the time-aligned and gain corrected signals. - View Dependent Claims (7, 8, 9, 10)
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11. A dual microphone near field voice enhancement arrangement in a motor vehicle, the arrangement comprising:
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two microphones, a first said microphone being mounted to the left of a human driver of the motor vehicle, and a second said microphone being mounted to the right of the human driver, each said microphone being configured to produce a respective microphone signal indicative of sounds within a passenger compartment of the motor vehicle; an electronic processor communicatively coupled to the microphones and configured to; receive the microphone signals; calculate a time delay between the microphone signals; use the calculated time delay to estimate amplitudes of the microphone signals; apply a respective time delay to each of the microphone signals based on the calculated time delay to produce two time-aligned signals; apply a respective gain to each of the time-aligned microphone signals based on the estimated amplitudes to produce two time-aligned and gain corrected signals; and sum the time-aligned and gain corrected signals; and a loudspeaker communicatively coupled to the electronic processor and configured to emit audible sounds based on the sum of the gain corrected signals. - View Dependent Claims (12, 13, 14)
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Specification