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US 8,428,285 B2Granted
Microphone screen with common mode interference reduction
AssigneePlantronics, Inc.
InventorsRobert Khamashta, Ching Shyu, Dennis Fish
Life of this patent
Estimating the term…
Abstract
A microphone assembly includes a microphone composed of a case having an open end and a printed circuit board. The printed circuit board is disposed in the open case end. The microphone assembly further includes a metal screen coupled to the case over the printed circuit board for shielding the microphone from electromagnetic interference. The metal screen includes several apertures.
Claims8
A microphone system comprising:
- a microphone comprising:
- an electrically conductive microphone case;
- a printed circuit board that comprises an interior side facing an interior of the electrically conductive microphone case and an exterior side facing outwards;
- a diaphragm disposed within the electrically conductive microphone case, wherein the diaphragm comprises a diaphragm first face and a diaphragm second face;
- a rear microphone port disposed in the printed circuit board and that is acoustically coupled to the diaphragm second face;
- a front microphone port disposed in the electrically conductive microphone case acoustically coupled to the diaphragm first face;
- and
- a first microphone boot disposed about the microphone comprising a first boot port acoustically coupled to the front microphone port;
- and
- an electrically conductive second microphone boot electrically coupled to the electrically conductive microphone case, wherein the electrically conductive second microphone boot comprises a second boot port acoustically coupled to the rear microphone port.
7 more elements
Dependencies are inferred from the claim text.