Boundary microphone
AssigneeKabushiki Kaisha Audio-Technica
InventorHiroshi Akino
Life of this patent
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Abstract
A boundary microphone is provided that does not generate spark discharge during an operation of a switch. The boundary microphone includes a microphone unit 6, and a switching unit (a button 4, a tube 9, a detector 10, a comparator, and a switching circuit) that switches turning-on or turning-off of output signals from the microphone unit 6, wherein the switching unit (the button 4, the tube 9, the detector 10, the comparator, and the switching circuit) includes an air chamber 9 and a controller that controls the turning-on or turning-off based on the air pressure inside the air chamber 9.
Claims9
A boundary microphone comprising:
- a first microphone unit;
- a switching unit that switches turning-on or turning-off of output signals from the first microphone unit, and
- a detector comprising a second microphone unit,
- wherein the switching unit comprises:
- an air chamber;
- a controller that controls the turning-on or turning-off based on an air pressure in the air chamber;
- and
- an operating unit that varies the air pressure in the air chamber in response to a pressing operation of the operating unit, wherein
- the second microphone unit comprises a diaphragm that vibrates in response to the air pressure and a fixed electrode that constitutes a condenser together with the diaphragm, and
- the detector detects the air pressure based on a variation in the capacitance between the diaphragm and the fixed electrode.
Dependencies are inferred from the claim text.