Signal responsive automatic control for audio equipment

Details Signal responsive automatic control for audio equipment Signal responsive automatic control for audio equipment

1982-04-02

1984-03-20

Rubinson, G. Z.

Electrical audio signal processing systems and devices

Including amplitude or volume control

Automatic

179 2B, H04M 1100, H03G 320

Patent

active

044385277

ABSTRACT:
A remote volume control apparatus for audio equipment is operated by the ringing of a telephone to slowly decrease the volume of an audio amplifier during the control's initial operation, maintain the volume at a preselected low volume and slowly increase the volume automatically after the termination of the telephone conversation. In the preferred embodiment, a circuit active indicator also is provided for indicating both proper apparatus operation an activation of the telelphone signal. An attenuation level control also is provided in the form of a switch selector operable to enable the user to preselect a desired attenuation level.

REFERENCES:
patent: 3300584 (1967-01-01), Jeanlin
patent: 3446976 (1969-05-01), Shaw
Radio and Electronics Constructor, vol. 34, No. 4, Dec. 1980, pp. 224-230, R. Penfold, "Opto Coupled Volume Expander".

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