. The Bell System technical journal . 5 8 11 1315 KC Fig. 2—Music. 5 8 11 13 15KC Fig. 3—Speecli Figs. 2 & 3—Detectability of changes in band width. able accuracy. For example, points for the 10 kc. curve are obtained fromthe values of each of the solid curves corresponding to an abscissa of 10 these curves, the difference limens for each band width were deter-mined by reading directly the bands corresponding to votes of 25% and 75%.The bands at which these votes occur therefore by definition differ from thereference band by one limen. The following table gives the intervals of onelime
. The Bell System technical journal . 5 8 11 1315 KC Fig. 2—Music. 5 8 11 13 15KC Fig. 3—Speecli Figs. 2 & 3—Detectability of changes in band width. able accuracy. For example, points for the 10 kc. curve are obtained fromthe values of each of the solid curves corresponding to an abscissa of 10 these curves, the difference limens for each band width were deter-mined by reading directly the bands corresponding to votes of 25% and 75%.The bands at which these votes occur therefore by definition differ from thereference band by one limen. The following table gives the intervals of onelimen as thus derived from the curves. 6 BELL SYSTEM TECHNICAL JOURNAL Differences in Upper Limit of Program Band in KC, Corresponding to One Limen Music Speech 3— 3— — 4— — 4— — 5— 6 — 5— —6— — 6— — 7— — 7— — 8—11 — 8 — 9— — —10— —108 —11—15 ——13 7 —13 11 —15 —15 The difference limens are seen to v
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
