Boots – shoes – and leggings
Patent
1979-06-27
1981-06-02
Atkinson, Charles E.
Boots, shoes, and leggings
364900, 179 1555T, 179 1J, G06F 506, H04J 318
Patent
active
042713315
ABSTRACT:
An analog signal processing system is described for changing the frequency of analog signals in a real-time manner. The system includes at least two analog shift registers, (specifically, three analog shift registers), an input circuit connecting the input end of all the registers in parallel, an output circuit selectively connectable to the output ends of the registers, a high frequency clock pulse source, a lower frequency clock pulse source, and cyclically operable switching means effective to load from the input circuit at least one analog shift register at the rate corresponding to the frequency of one of the clock pulses, while unloading at least one other register into the output circuit at the rate corresponding to the frequency of the other clock pulses.
Two applications are described, for purposes of example. One application is as a hearing aid device to reduce the frequency of audio signals in a real-time manner for a person having a limited-frequency audibility. The other application is a communication device for the real-time transmission and reception of audio signals rendering them unintelligible except by receivers equipped with a processing system for reducing the frequency of the received signals.
REFERENCES:
patent: 3949174 (1976-04-01), Sutton
patent: 3950617 (1976-04-01), Dildy
patent: 4003027 (1977-01-01), Di Matteo
patent: 4186643 (1980-02-01), Nishibe et al.
Atkinson Charles E.
Barish Benjamin J.
In-Mar Electronics
Kemeny E. S.
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