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, each of the pressure-gradient capsules having an entry surface and further 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 located on the same entry surface as the first sound entry opening and 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 the entry surface of the pressure-gradient capsule with the pressure-gradient capsules being angularly aligned with respect to each other and a front surface of one pressure-gradient capsule faces a front surface of the other pressure-gradient capsule where the entry surface is a front surface.
1 Assignment
0 Petitions
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.
10 Citations
32 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, each of the pressure-gradient capsules having an entry surface and further 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 located on the same entry surface as the first sound entry opening and 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 the entry surface of the pressure-gradient capsule with the pressure-gradient capsules being angularly aligned with respect to each other and a front surface of one pressure-gradient capsule faces a front surface of the other pressure-gradient capsule where the entry surface is a front surface. - 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)
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24. A microphone system, comprising:
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a housing including a housing opening; and two pressure-gradient capsules disposed in the housing, each of the pressure-gradient capsules includes an entry surface and further 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 located on the same entry surface as the first sound entry opening and 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 the entry surface of the pressure-gradient capsule, and where the two pressure-gradient capsules disposed in the housing comprise a first pressure-gradient capsule and a second pressure-gradient capsule, the first pressure-gradient capsule operable to generate a first audio signal and the second pressure-gradient capsule operable to generate a second audio signal and the pressure gradient capsules being angularly aligned with respect to each other such that a front surface of one pressure-gradient capsule faces a front surface of the other pressure-gradient capsule where the entry surface is a front surface, 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 (25, 26, 27, 28, 29)
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30. A microphone system, comprising:
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a housing including a housing opening; and two pressure-gradient capsules disposed in the housing, each of the pressure-gradient capsules includes an entry surface and further 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 located on the same entry surface as the first 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 the entry surface of the pressure-gradient capsule and the pressure-gradient capsules being angularly aligned with respect to each other such that a front surface of one pressure-gradient capsule faces a front surface of the other pressure-gradient capsule where the entry surface is a front surface; 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 and analyzing the first and second audio signals; and filter means for suppressing an interfering signal and equalizing a desired signal in response to a control signal provided from the control means where each of the first and second audio signals include at least one of the interfering signal or the desired signal. - View Dependent Claims (31, 32)
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Specification