. The Bell System technical journal . -20 -10 20 30 40 50 60 70 80 90 100 110 120 INTENSITY LEVEL-DB. -20 -10 ,0 20 30 40 50 60~~70 80 90 100 HO 120 INTENSITY LEVEL-DB Fig. 5 (A and B)—Loudness levels of pure tones. 396 BELL SYSTEM TECHNICAL JOURNAL namely, G(1000, L) = e ^;,G(1000, L,). (10) If the type of complex tone can be chosen so that bk is unity and alsoso that the values of Lk for each component are equal, then the funda-mental equation for calculating loudness becomes GiL) = wG(L,), (14) where n is the number of components. Since we are always dealingin this section with 6^(1000, L)
. The Bell System technical journal . -20 -10 20 30 40 50 60 70 80 90 100 110 120 INTENSITY LEVEL-DB. -20 -10 ,0 20 30 40 50 60~~70 80 90 100 HO 120 INTENSITY LEVEL-DB Fig. 5 (A and B)—Loudness levels of pure tones. 396 BELL SYSTEM TECHNICAL JOURNAL namely, G(1000, L) = e ^;,G(1000, L,). (10) If the type of complex tone can be chosen so that bk is unity and alsoso that the values of Lk for each component are equal, then the funda-mental equation for calculating loudness becomes GiL) = wG(L,), (14) where n is the number of components. Since we are always dealingin this section with 6^(1000, L) or G(1000, Lk), the 1000 is left out inthe above nomenclature. If experimental measurements of L corre-sponding to values of Lk are taken for a tone fulfilling the above con-ditions throughout the audible range, the function G can be we accept the theory that, when two simple tones widely separatedin frequency act upon the ear, the nerv^e terminals stimulated by eachare at different portions of the basilar membrane, then we wouldexpect the interference of the loudness of one upon
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
