Apparatus for the transmission of speech

Details Apparatus for the transmission of speech Apparatus for the transmission of speech

1989-01-19

1990-08-28

Ng, Jin F.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 68, 381 682, 381 94, H04R 2500, H03G 500

Patent

active

049532162

ABSTRACT:
An apparatus for the transmission of speech, suitable for use in a hearing aid, has an acoustic input transducer followed by a controlled-gain broadband amplifier, which is followed by a parallel circuit of a number of frequency-selecting channels. The frequency-selecting channels divide the broadband output signal of the controlled-gain amplifier into a number of selected frequency channels. A threshold switch is included in each frequency-selecting channel. An acoustic output transducer is supplied with the sum of the output signals of the individual threshold switches.

REFERENCES:
patent: 3803357 (1974-09-01), Sacks
patent: 3818149 (1974-06-01), Stearns et al.
patent: 4185168 (1980-01-01), Graupe et al.
patent: 4506381 (1985-03-01), Ono
patent: 4508940 (1985-04-01), Steeger
patent: 4680798 (1987-07-01), Neumann
"Clincal Results of Hearing aid with Noise-Level-Controlled Selective Amplication", Ono et al, Audiology, vol. 22 (1983) pp. 494-515.

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