Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent
1995-06-08
1996-09-10
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
381187, H04R 2500
Patent
active
055555543
ABSTRACT:
A headset speaker is provided in which a driver is provided in the dome of a speaker earcup and the dome has at least one vent aperture. The vent hole is closed by a movable closure having a corresponding opening therein that permits the size of the opening into the dome to be logarithmically varied between a fully open and fully closed position. A Thuras tube tuned to enhance bass frequencies is provided extending between the driver side and rear of the earcup. An opening to the Thuras tube remains fully closed by the movable closure unless the cup vent aperture is fully closed at which time the Thuras tube is opened.
REFERENCES:
patent: 4027116 (1977-05-01), Nakamura
Hofer Alan
Stanton Walter O.
Kuntz Curtis
Stanton Magnetics Inc.
Tran Sinh
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