Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent
1988-11-30
1990-11-20
Ng, Jin F.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
381 72, 379430, H04M 105, H04R 108
Patent
active
049724916
ABSTRACT:
A combination ear protector and communications headset particularly adapted to the rugged, lightweight, convenience needs of aircraft ground crew members that are required to work in a hazardous noise environment. The headset includes two earplug-type transducers that function as a combination ultrasensitive microphone and speaker which are automatically inserted into the user's ears when the invention is disposed for use, thereby sealing the interior of the ear from ambient noise. In the ear protection mode of use, the headset is quickly and easily convertible to communications usage.
REFERENCES:
patent: 2946862 (1960-07-01), Wadsworth et al.
patent: 3819860 (1974-06-01), Miller
patent: 4006318 (1977-02-01), Sebesta et al.
patent: 4652702 (1987-03-01), Yoshii
patent: 4691045 (1987-09-01), Rosenthal
patent: 4771454 (1988-09-01), Wilcox, Jr.
McGeary, III. M. Nelson
Ng Jin F.
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