System for separately receiving multiple station audio-tour sign

Details System for separately receiving multiple station audio-tour sign System for separately receiving multiple station audio-tour sign

1982-08-12

1984-06-26

Bookbinder, Marc E.

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

179 82, 455 50, 455 63, H04B 500, H04B 1500

Patent

active

044570198

ABSTRACT:
A system is provided for the separate reception of a selected one of multiple and proximate AM modulated frequencies, for use in self-guided audio-tours of museums and similar facilities.
The system includes a series of listening zones, each of which is normally associated with a pre-recorded, repeating taped message. The messages are broadcast to an AM receiver from a plurality of induction loops, each one associated with its respective station and respective taped message. Adjacent induction loops use different, but proximate, carrier frequencies. The messages are received on a broad-band, non-tunable AM receiver which "captures" the frequency of the carrier for the particular viewing station and excludes "cross-talk" from adjacent stations.

REFERENCES:
patent: 2545511 (1951-03-01), Brinkley
patent: 3078348 (1963-02-01), McIntosh
patent: 3118144 (1964-01-01), Arber

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