. The Bell System technical journal . ant. A volume measurement means thata given impression is exceeded a small percentage of the time. In speech the peaksare relatively higher than in the wave illustrated. assumed that the amplification varies in inverse proportion to thesquare root of the impression. The resulting waves for RCjP = .0025and .025 (medium impressions) are recognizable as something like theoriginal wave. However, for the larger values of RC/P (weak im-pressions), the distortion at the beginning of the wave is quite is because the impressions are formed so slowly that
. The Bell System technical journal . ant. A volume measurement means thata given impression is exceeded a small percentage of the time. In speech the peaksare relatively higher than in the wave illustrated. assumed that the amplification varies in inverse proportion to thesquare root of the impression. The resulting waves for RCjP = .0025and .025 (medium impressions) are recognizable as something like theoriginal wave. However, for the larger values of RC/P (weak im-pressions), the distortion at the beginning of the wave is quite is because the impressions are formed so slowly that a longer timeis required to drive the gain down to the desired value. In order to compare impression compression with instantaneouscompression, the ordinates of Fig. 5 and 8 were plotted in Fig. shows that the greatest possibilities of bunching the waves intoa narrow range result from the use of instantaneous compression (b),since the ratio between any value and the maximum is modified by the 532 BELL SYSTEM TECHNICAL JOURNAL. > N JJl cn c -o X c c 0) So t- -C-Q - (U r, ■O CO fCi (LI lO aJ C (H bo >> J= Jh (Tt c 3 > C X5 O tn tn aj O. tu n3 OJ <u <u !-• !-• -4-) bo rt ti o o <u ■ Uh ti bo ^^ U^ AMPLITUDE RANGE CONTROL 533
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
