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- W3150931813 abstract "A description of equipment providing acoustical trans- mission over ordinary telephone lines and utilizing standard tele- phone handsets is presented. Included is a discussion of the more pertinent parameters which determine the final design of the equipment. Among them are proper orientation of the granular carbon transmitter, maximum line bit rates, and tolerable total harmonic distortion. The frequency and transient response of all acoustical transducers employed in the equipment are presented. The results of local and cross-country tests-are summarized; also included is a summary of the actual operational experience over a period of two years from large numbers of units in use over the entire country." @default.
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- W3150931813 date "1969-01-01" @default.
- W3150931813 modified "2023-09-23" @default.
- W3150931813 title "Acoustic Transmission System" @default.
- W3150931813 hasPublicationYear "1969" @default.
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