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US 7,116,792 B1Granted
Directional microphone system
AssigneeGN ReSound North America Corporation
InventorsJon C. Taenzer, Roman E. Roginsky
Life of this patent
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Abstract
A second-order microphone system is constructed of two null-less first-order microphone elements. The null-less first-order microphone elements prevent the degradations that occur in performance when a second-order microphone system is used at the side of a person's head.
Claims35
A microphone system comprising:
- two first-order microphone elements, each of the first-order microphone elements having a finite delay ratio (DR) greater than one, and
- a combining unit operably connected to the two first-order microphone elements, wherein the combining unit is such that the microphone system comprises a second- or higher-order microphone system, wherein the microphone system is adapted for positioning near a diffractive body.
A microphone system comprising:
- two first-order microphone elements, each of the first-order microphone elements having no nulls, and
- a combining unit operable connected to the two first-order microphone elements, wherein the combining unit is such that the microphone system comprises a second- or higher-order microphone system.
A microphone system comprising:
- two first-order microphone elements, each of the first-order microphone elements having a delay ratio (DR) in the range 1.5 to 5, and
- a combining unit operable connected to the two first-order microphone elements, wherein the combining unit is such that the microphone system comprises a second- or higher-order microphone system.
A method of matching the outputs of two microphone elements for use in a microphone system, comprising:
- providing a microphone system having two microphone elements, each of the microphone elements oriented having a front and back direction, the output of the two microphone elements being greater for sounds coming from the front direction than from the back direction;
- providing a test sound to the two microphone elements, the test sound coming preferentially from the back direction;
- and
- using the output of the two microphone elements during the sound test to match the two microphone elements.
1 more element
Dependencies are inferred from the claim text.