. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 118 BELL SYSTEM TECHNICAL JOURNAL roughly, 40 ohms resistance. The low side of the other transformer operates through a tuned circuit into a similar thermocouple heater. THf?'-%^CoL)P^C. Miccs>*^'-v-,c Tta Fig. 1- -Circuit Used for the Analysis of Speech. (The Usual Details of the Three- Stage Amplifier Are Not Shown) The diagram of Fig. 1 exhibits the essential features of the electrical circuits just described. When the diaphragm of the condenser transmitter is se
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 118 BELL SYSTEM TECHNICAL JOURNAL roughly, 40 ohms resistance. The low side of the other transformer operates through a tuned circuit into a similar thermocouple heater. THf?'-%^CoL)P^C. Miccs>*^'-v-,c Tta Fig. 1- -Circuit Used for the Analysis of Speech. (The Usual Details of the Three- Stage Amplifier Are Not Shown) The diagram of Fig. 1 exhibits the essential features of the electrical circuits just described. When the diaphragm of the condenser transmitter is set in vibration by speech a current made up of a range of frequencies flows in the heater of thermocouple I., while the heater of thermocouple II is traversed only by such a band of frequencies as the resonant circuit allows. Fig. 2 shows a number of typical resonance curves obtained. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
