Stereo microphone unit and stereo microphone
AssigneeKabushiki Kaisha Audio-Technica
InventorsHiroshi Akino, Satoshi Yoshino
Life of this patent
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Abstract
A stereo capacitor microphone unit includes: two unidirectional microphone units integrally formed with respective fixed electrodes of the unidirectional microphone units facing each other; and an insulating spacer that is interposed between the fixed electrodes and provided with a gap formed at a portion of an outer periphery towards radial direction. The gap communicates fixed electrode rear spaces of the respective unidirectional microphone units with an external space to serve as a common rear acoustic terminal for the unidirectional microphone units.
Claims6
A stereo capacitor microphone unit comprising:
- two unidirectional microphone units integrally formed with respective fixed electrodes of the unidirectional microphone units facing each other;
- and
- an insulating spacer that is interposed between the fixed electrodes and provided with a gap formed at a portion of an outer periphery extending towards a center of the insulating spacer, wherein
- the gap communicates fixed electrode rear spaces of the respective unidirectional microphone units with an external space to serve as a common rear acoustic terminal for the unidirectional microphone units.
A stereo capacitor microphone unit comprising:
- two unidirectional microphone units integrally formed with respective fixed electrodes of the unidirectional microphone units facing each other;
- and
- an insulating spacer that is interposed between the fixed electrodes and provided with a gap formed at a portion of an outer periphery towards radial direction, wherein
- the gap communicates fixed electrode rear spaces of the respective unidirectional microphone units with an external space to serve as a common rear acoustic terminal for the unidirectional microphone units, and
- wherein a directional axis of each of the unidirectional microphone units is offset by a certain angle from a main axis of the each of the unidirectional microphone units, and the directional axes of the unidirectional microphone units foam an angle of 120 degrees at a midpoint of a main axis of the stereo capacitor microphone unit.
Dependencies are inferred from the claim text.