Opto-acoustic telephone receiver

Details Opto-acoustic telephone receiver Opto-acoustic telephone receiver

1975-09-12

1977-01-11

Safourek, Benedict V.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250211R, 350 96WG, 179182R, 181138, 181159, H04B 900

Patent

active

040028976

ABSTRACT:
An opto-acoustic telephone receiver, for converting optical signals propagating in an optical fiber waveguide into audible acoustic signals, includes an optical absorption cell having a volume of the order of 10.sup.-.sup.3 cm.sup.3, acoustically coupled to the narrow end of a tapered acoustic tube whose wide end can be acoustically coupled to a human ear.

REFERENCES:
patent: 235199 (1880-12-01), Bell
patent: 235496 (1880-12-01), Bell
patent: 241909 (1881-05-01), Bell
patent: 3659452 (1972-05-01), Atwood
patent: 3700890 (1972-10-01), Kruezer
"Upon the Production of Sound by Radiant Energy," Phil. Mag., Series 5, vol. 11, pp. 510-528; 1881.
Acoustical Engineering, Olson, D. van Nostrand Co. Inc. Copyright 1957, pp. 100-123.
Journal of Applied Physics, (June 1971), "Ultralow Gas Concentration Infrared Absorption Spectroscopy," pp. 2934-2939.

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