. Bell telephone magazine . (Above) The ControlRoom in the BasementOF THE PhiladelphiaAcademy of Music. Munson of the BellTelephone Laboratoriesmeasuring power level sentto Washington and R. of the Bell Tele-phone Company of Penn-sylvania talking on theorder wire. At the leftare the power amplifiersand at the right switchingapparatus used in the dem-onstrations. (Right_) D. T. Bell ofBell Telephone Laboka-TORiES, at the in Constitu-tion Hall, WashingtonD. PERFECT TRANSMISSION AND REPRODUCTION OF MUSIC 40 cycles to 15,000 cycles. The frequency of the tone wasi
. Bell telephone magazine . (Above) The ControlRoom in the BasementOF THE PhiladelphiaAcademy of Music. Munson of the BellTelephone Laboratoriesmeasuring power level sentto Washington and R. of the Bell Tele-phone Company of Penn-sylvania talking on theorder wire. At the leftare the power amplifiersand at the right switchingapparatus used in the dem-onstrations. (Right_) D. T. Bell ofBell Telephone Laboka-TORiES, at the in Constitu-tion Hall, WashingtonD. PERFECT TRANSMISSION AND REPRODUCTION OF MUSIC 40 cycles to 15,000 cycles. The frequency of the tone wasindicated by a line moving across a large chart showing amusical scale extended to accommodate this wide the effects of eliminating high and low frequencies fromboth a fife and drum duet and from the music of the orchestrawere presented. By this demonstration the audience had theopportunity of judging the importance of the complete rangeto the full aesthetic appeal of music, and of comparing it withthe more limited ranges ordinarily heard with other methods ofreproduction. The technical features of these new developments, whichwere carried on as part of the research program of the Ameri-can Telephone and Telegraph Company, were disclosed forthe first time by Dr. F. B. Jewett, Vice President of the Ameri-can Telephone and Telegraph Company in charge of develop-ment and research, at a meeting of the National Academy ofSciences on Tuesday afternoon of April 25th. In discussi
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922
