Directional microphone assembly
First Claim
Patent Images
1. A hearing aid comprising:
- at least one microphone cartridge having a length;
a first sound passage having a first sound inlet, the first sound inlet having a first diameter dimension, the first sound passage coupling sound energy to a first sound port of the at least one microphone cartridge; and
a second sound passage having a second sound inlet, the second sound inlet having a second diameter dimension, the second sound passage coupling sound energy to a second sound port of the at least one microphone cartridge, the first and second sound inlets having a longest dimension therebetween that is less than or approximately equal to the sum of the length, the first diameter dimension, and the second diameter dimension.
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Abstract
A directional microphone assembly for a hearing aid is disclosed. The hearing aid has one or more microphone cartridge(s), and first and second sound passages. Inlets to the sound passages, or the sound passages themselves, are spaced apart such that the shortest distance between them is less than or approximately equal to the length of the microphone cartridge(s). A sound duct and at least one surface of a microphone cartridge may form each sound passage, where the sound duct is mounted with the microphone cartridge. Alternatively, each sound duct may be formed as an integral part of a microphone cartridge.
44 Citations
34 Claims
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1. A hearing aid comprising:
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at least one microphone cartridge having a length;
a first sound passage having a first sound inlet, the first sound inlet having a first diameter dimension, the first sound passage coupling sound energy to a first sound port of the at least one microphone cartridge; and
a second sound passage having a second sound inlet, the second sound inlet having a second diameter dimension, the second sound passage coupling sound energy to a second sound port of the at least one microphone cartridge, the first and second sound inlets having a longest dimension therebetween that is less than or approximately equal to the sum of the length, the first diameter dimension, and the second diameter dimension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A hearing aid comprising:
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at least one microphone cartridge having a first outer surface, a first port located in the first outer surface, a second outer surface, and a second port located in the second outer surface;
a first sound duct having a first inner surface, the first sound duct operatively coupled to at least the first outer surface of the at least one microphone cartridge, the first inner surface of the first sound duct and at least the first outer surface of the at least one microphone cartridge creating a volume representative of a first sound passage to the first port; and
a second sound duct having a second inner surface, the second sound duct operatively coupled to at least the second outer surface of the at least one microphone cartridge, the second inner surface of the second sound duct and at least the second outer surface of the at least one microphone cartridge creating a volume representative of a second sound passage to the second port. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34)
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18. A hearing aid comprising:
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at least one microphone cartridge having a length;
a first sound passage communicating with the at least one microphone cartridge; and
a second sound passage communicating with the at least one microphone cartridge, the first and second sound passages having a shortest dimension therebetween that is less than or approximately equal to the length of the at least one microphone cartridge.
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26. A hearing aid comprising:
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a housing having an outer surface, the outer surface having a first sound inlet and a second sound inlet;
at least one microphone cartridge having a length;
a first sound passage coupling sound energy from said first sound inlet to said at least one microphone cartridge;
a second sound passage coupling sound energy from said second sound inlet to said at least one microphone cartridge; and
the first and second sound inlets having a shortest dimension therebetween that is less than or approximately equal to the length of the at least one microphone cartridge.
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Specification