VEHICLE ACCESSORY MICROPHONE
First Claim
Patent Images
1. A vehicle accessory comprising:
- an accessory housing for attaching to a vehicle;
at least one transducer carried by the accessory housing; and
a microphone interface circuit electrically coupled between the transducers and a remote processing circuit located remote from the vehicle accessory where the microphone interface circuit includes an inverted comb filter for eliminating predetermined frequencies between harmonics of the human voice in a predetermined frequency range.
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Abstract
A microphone assembly includes one or more transducers (2210) that are positioned in one or more housings. A preprocessing circuit (2215) includes a inverted comb filter (2245) for eliminating predetermined frequencies between harmonics of the human voice in a predetermined frequency range. A processing circuit (2220) coupled to the preprocessing circuit (2215) is used for outputting an electrical signal such that the transducers (2210) used in combination with the processing circuit (2220) very effectively cancels noise. The microphone assembly can be employed in a vehicle accessory such as a vehicular mirror.
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Citations
26 Claims
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1. A vehicle accessory comprising:
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an accessory housing for attaching to a vehicle; at least one transducer carried by the accessory housing; and a microphone interface circuit electrically coupled between the transducers and a remote processing circuit located remote from the vehicle accessory where the microphone interface circuit includes an inverted comb filter for eliminating predetermined frequencies between harmonics of the human voice in a predetermined frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle accessory comprising:
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an accessory housing for attaching to a vehicle; a first transducer carried by the accessory housing and generating a first audio signal; a second transducer carried by the accessory housing and generating a second audio signal; and a microphone interface circuit electrically coupled between the transducers and a remote processing circuit located remote from the vehicle accessory, the microphone interface circuit including an inverted comb filter for eliminating noise located between harmonics of the human voice in a predetermined frequency range. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A vehicle accessory comprising:
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an accessory housing for attaching to a vehicle; a first transducer carried by the accessory housing and generating a first audio signal; a second transducer carried by the accessory housing and generating a second audio signal; a high frequency boost circuit coupled to the first transducer and second transducer for receiving the first audio signal and second audio signal and for boosting the frequency response at high frequencies to compensate for the effect of noise in the vehicle; and a microphone interface circuit electrically coupled between the first transducer and second transducer and a remote processing circuit located remote from the vehicle accessory where the microphone interface circuit includes an inverted comb filter for eliminating noise located between harmonics of the human voice in a predetermined frequency range. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A vehicle accessory comprising:
- an accessory housing for attaching to a vehicle;
a plurality of transducers carried by the accessory housing and generating a plurality of respective audio signals; a microphone interface circuit electrically coupled between the plurality of transducers and a remote processing circuit located remote from the vehicle accessory, the microphone interface circuit including at least one inverted comb filter for eliminating predetermined frequencies between harmonics of the human voice in a predetermined frequency range; and a noise level detector for adjusting the amplitude of a signal output of the inverted comb filter. - View Dependent Claims (23, 24, 25, 26)
- an accessory housing for attaching to a vehicle;
Specification