Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent
1991-02-04
1992-09-01
Ng, Jin F.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
381 25, 381 74, 381187, H04R 2502
Patent
active
051446782
ABSTRACT:
A headset is provided, of a type which includes a pair of earmuff devices at opposite ends of a head band, which automatically switches an electronic circuit on or off when the headset is placed on the head or taken off, in a simple and rugged construction. Each earmuff device is of the type that includes a largely rigid housing (24, FIG. 3) and a soft resilient cushion (30) mounted on the housing and designed to receive the ear of the wearer and press against the side of the wearer's head which surrounds his ear. A switch (54) connected to the circuit includes an actuating device (60) that is depressed and released along with the cushion. One type of switch (54) is a mechanical type whose actuator device (60) has a front end lying against a rear side (64) of the cushion to be deflected and operate the switch when the cushion is rearwardly deflected during placement on the wearer's head. Another switch includes an electrically conductive element (92, FIG. 5) lying on the forward surface of the cushion to directly contact the wearer's skin, and a detect subcircuit (96) which is responsive to the electrical potential of the wearer's body to switch the electronic circuit.
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patent: 4955729 (1990-09-01), Marx
Freilich Arthur
Golden West Communications Inc.
Hornbaker Robert D.
Lefkowitz Edward
Ng Jin F.
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