VEHICULAR MICROPHONE ASSEMBLY USING FRACTIONAL POWER PHASE NORMALIZATION
First Claim
1. A digital microphone system comprising:
- a plurality of digital microphones each having a digital output signal;
a digital signal processor (DSP) for receiving each digital output signal and providing a processed digital output signal; and
wherein each of the plurality of digital microphones are phase normalized as a function of the audio frequency received at the digital microphones.
1 Assignment
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Accused Products
Abstract
A triangular microphone assembly (101) for use in a vehicle accessory includes a mirror housing (106) adapted for attachment to the interior of the vehicle. A mirror is disposed in an opening of the mirror housing (106) and a plurality of virtual digital microphones (108a, 108b, 108c) are arranged in a substantially triangular configuration in the mirror housing (106). A digital signal processor (DSP) (537) is used for receiving signals from the plurality of digital microphones (108a, 108b, 108c) such that the digital microphones exhibit directional characteristics for reducing undesirable noise in at least one direction by normalizing the phase of the received signals as a function of signal frequency.
26 Citations
27 Claims
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1. A digital microphone system comprising:
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a plurality of digital microphones each having a digital output signal; a digital signal processor (DSP) for receiving each digital output signal and providing a processed digital output signal; and wherein each of the plurality of digital microphones are phase normalized as a function of the audio frequency received at the digital microphones. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicular audio signal processing system for use with electronic devices comprising:
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a plurality of digital microphones providing a plurality of signals; a digital signal processor (DSP) using at least one non-linear process for processing the plurality of signals; and wherein the non-linear process provides phase correction as a function of frequency input into the plurality of digital microphones for accounting for non-ideal phase characteristics of the audio received at the plurality of digital microphones. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A microphone assembly for use in a vehicle comprising:
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a rearview mirror housing adapted for attachment to the interior of the vehicle, the rearview mirror housing having a back surface generally facing the front of the vehicle and an opening generally facing the rear of the vehicle; a mirror disposed in the opening of the mirror housing; a plurality of microphone transducers arranged in a substantially triangular configuration in the mirror housing to form a microphone array; and wherein each of the plurality of digital microphones are phase normalized as a function of the audio frequency received at the digital microphones for use with a digital signal processor (DSP). - View Dependent Claims (17, 18, 19, 20, 21)
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22. A triangular microphone assembly for use in a vehicle accessory comprising:
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a mirror housing adapted for attachment to the interior of the vehicle; a mirror disposed in an opening of the mirror housing; a plurality of virtual digital microphones arranged in a substantially triangular configuration in the mirror housing; a digital signal processor (DSP) for receiving signals from the plurality of digital microphones; and wherein the digital microphones exhibit directional characteristics for reducing undesirable noise in at least one direction by normalizing the phase of the received signals as a function of signal frequency. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification