Microphone system having pressure-gradient capsules
First Claim
1. A microphone system for use with hands-free devices, comprising:
- a housing including a housing opening; and
two pressure-gradient capsules disposed in the housing, the capsule including;
a diaphragm having a front side and a rear side;
a first sound entry opening connected with the front side in an acoustically conductive manner; and
a second sound entry opening connected with the rear side in an acoustically conductive manner;
where the first sound entry opening and the second sound entry opening are located on an entry surface of the capsule.
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Accused Products
Abstract
A microphone system may include a housing having a housing opening. Pressure-gradient capsules may be provided in the housing. The capsules may include a diaphragm and at least one sound entry opening. One sound entry opening may be connected with a front side of the diaphragm in an acoustically conductive manner and another sound entry opening may be connected with a rear side of the diaphragm in an acoustically conductive manner. The sound entry openings may be located in each of the pressure-gradient capsule on an entry surface. The diaphragms of the pressure-gradient capsules may be oriented substantially parallel to each other. The sound entry opening may be directed into a space, which may be closed in a direction perpendicular to the entry surface. The space may be connected to the housing opening in an acoustically conductive manner. The microphone system may be compact and robust, and it may be suitable for use with hands-free devices.
65 Citations
44 Claims
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1. A microphone system for use with hands-free devices, comprising:
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a housing including a housing opening; and
two pressure-gradient capsules disposed in the housing, the capsule including;
a diaphragm having a front side and a rear side;
a first sound entry opening connected with the front side in an acoustically conductive manner; and
a second sound entry opening connected with the rear side in an acoustically conductive manner;
where the first sound entry opening and the second sound entry opening are located on an entry surface of the capsule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A microphone system, comprising:
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a first pressure-gradient capsule operable to generate a first audio signal;
a second pressure-gradient capsule operable to generate a second audio signal where the first and second pressure-gradient capsules are disposed to produce directional characteristics of the first audio signal and the second audio signal; and
a sound signal processing unit including;
a controller operable to receive and analyze the first and second audio signals from the first and second pressure-gradient capsules; and
an adaptive filter operable to filter the first audio signal and the second audio signal in response to a control signal supplied from the controller. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A microphone system, comprising:
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means for generating a first audio signal and a second audio signal where the first audio signal and the second audio signal have different directional characteristics;
control means for receiving the first and second audio signals and analyzing them;
filter means for suppressing an interfering signal and equalizing a desired signal in response to a control signal provided from the control means where the first and second audio signals include at least one of the interfering signal or the desired signal. - View Dependent Claims (35, 36)
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37. A method for processing a signal from a microphone system, comprising:
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generating a first audio signal at a first pressure-gradient capsule;
generating a second audio signal at a second pressure-gradient capsule;
converting the first audio signal and the second audio signal in a digital format;
analyzing the first audio signal and the second audio signal at a control unit; and
filtering the first audio signal and the second audio signal at an adaptive filter. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44)
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Specification