Dynamic microphone unit and dynamic microphone
AssigneeKabushiki Kaisha Audio-Technica
InventorHiroshi AKINO
Life of this patent
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Abstract
A dynamic microphone includes: a diaphragm; a voice coil fixed to the diaphragm; a magnetic circuit which includes a magnetic gap in which the voice coil is arranged and generates a magnetic field in the magnetic gap; a volume reducing member which is attached to the magnetic circuit, is arranged in aback surface space of the diaphragm, and reduces, and reduces a volume in an air chamber in the back surface space; a communication passage which is formed along between the volume reducing member and the magnetic circuit and communicates the back surface space with a back side air chamber; and an acoustic resistance which is attached to the magnetic circuit and intervenes between the communication passage and the back side air chamber.
Claims11
A dynamic microphone unit, comprising:
- a diaphragm;
- a voice coil fixed to the diaphragm;
- a magnetic circuit which includes a magnetic gap in which the voice coil is arranged and generates a magnetic field in the magnetic gap;
- a volume reducing member which is attached to the magnetic circuit, is arranged in a back surface space of the diaphragm, and reduces, and reduces a volume in an air chamber in the back surface space;
- a communication passage which is formed along between the volume reducing member and the magnetic circuit and communicates the back surface space with a back side air chamber formed on a back side of the magnetic circuit;
- and
- an acoustic resistance which is attached to the magnetic circuit and intervenes between the communication passage and the back side air chamber.
A dynamic microphone unit, comprising:
- a diaphragm;
- a voice coil fixed to the diaphragm;
- a magnetic circuit which includes a magnetic gap in which the voice coil is arranged and generates a magnetic field in the magnetic gap;
- a volume reducing member which is attached to the magnetic circuit, is arranged in a back surface space of the diaphragm, and reduces a volume in an air chamber in the back surface space;
- and
- an acoustic resistance comprising a thin air layer, which is formed along between the volume reducing member and the magnetic circuit and communicates the back surface space with a back side air chamber formed on a back side of the magnetic circuit.
Dependencies are inferred from the claim text.