Echo annexation device

Details Echo annexation device Echo annexation device

1976-02-02

1978-09-05

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

84 125, 84DIG26, 179 1J, 333 71, H03H 930, G10H 102, H03H 926

Patent

active

041123964

ABSTRACT:
The present invention is related to devices for annexing an echo resembling natural reverberation in the course of sound recording, in which a line or lines of coil spring with a portion or portions protruded axially at a right angle are spanned between the drive-transducer and the pickup-transducer.

REFERENCES:
patent: 3092792 (1963-06-01), Daniel
patent: 3106610 (1963-10-01), Young
patent: 3136853 (1964-06-01), Bissonette et al.
patent: 3199053 (1965-08-01), Bunger
patent: 3288931 (1966-11-01), Bunger
patent: 3333061 (1967-07-01), Dow
patent: 3363202 (1968-01-01), Meinema
patent: 3402371 (1968-09-01), Weingartner et al.
patent: 3517344 (1970-06-01), Fidi
patent: 3564462 (1971-02-01), Fidi et al.
patent: 3649933 (1972-03-01), Fidi et al.

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