Electrical audio signal processing systems and devices – Including amplitude or volume control
Reexamination Certificate
2005-11-01
2005-11-01
Tran, Sinh (Department: 2644)
Electrical audio signal processing systems and devices
Including amplitude or volume control
C381S072000, C381S074000, C381S107000
Reexamination Certificate
active
06961436
ABSTRACT:
A noise-protecting arrangement for ear protector includes an audio-frequency receiving unit, a first audio-frequency amplifying unit, a volume control amplifying unit, a current amplifying unit, a gain control signal unit, an impedance matching unit, a gain control unit, a gain adjusting unit, a volume regulating unit, a second audio-frequency amplifying unit, and an audio-frequency output unit. The noise-protecting arrangement automatically attenuates a noise that enters into the ear protector and is higher than a predetermined dB level, and thereby protects a user's eardrum. The ear protector with this noise-protecting arrangement is suitable for use in environments in which various machine tools, such as drills, millers, lathes and the like are operated, firing training is performed, high-pressure air horn, vehicles, and aircrafts are maintained, or other types of high-frequency noises exist.
REFERENCES:
patent: 4536888 (1985-08-01), Wilson
patent: 4918745 (1990-04-01), Hutchison
patent: 2005/0094824 (2005-05-01), Chuang
Faulk Devona E
Tran Sinh
Troxell Law Office PLLC
LandOfFree
Noise-protecting arrangement for ear protector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Noise-protecting arrangement for ear protector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise-protecting arrangement for ear protector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3463099