. The Bell System technical journal . UHI : >s< r (MJcn-secoNos) n^QUENCr (cp!^ 1 il , Ul 1 Ttr I » ffcouef/crrc^j --LUi FSCQUENCr (Cf?S.) ftlEQUENCy (CPS.) ! ^. \ mcquENcy °) 1 ^ \, \ S iVE^eNcr (cesf y\ ^ - ^ fn?E ?ME AO- (CPS r 1 1 ^ ~ - ^ /=ee (Sat r (c^ 1 1 ^ ^ ffiS out -JJ -rfii •m 1 1 !^ \ \ m -qu, re* \ tuM L FIfEQuefJCr (c. ffSi Fig. 7—Measured indicial response versus measured frequency response of various typesof telephone receivers and electrical filters. The effects of further increases in damping are shown by curves 4, 5, and changes in the shape of t

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. The Bell System technical journal . UHI : >s< r (MJcn-secoNos) n^QUENCr (cp!^ 1 il , Ul 1 Ttr I » ffcouef/crrc^j --LUi FSCQUENCr (Cf?S.) ftlEQUENCy (CPS.) ! ^. \ mcquENcy °) 1 ^ \, \ S iVE^eNcr (cesf y\ ^ - ^ fn?E ?ME AO- (CPS r 1 1 ^ ~ - ^ /=ee (Sat r (c^ 1 1 ^ ^ ffiS out -JJ -rfii •m 1 1 !^ \ \ m -qu, re* \ tuM L FIfEQuefJCr (c. ffSi Fig. 7—Measured indicial response versus measured frequency response of various typesof telephone receivers and electrical filters. The effects of further increases in damping are shown by curves 4, 5, and changes in the shape of the curve are brought about by relatively simple INDICIAL RESPONSE OF TELEPHONE RECEIVERS 145 changes of the constants of the acoustic circuits. The oscillograms indicatea marked improvement as regards oscillations, which is to be expected withincreased damping. The time delay is eventually degraded with furtherincreases of damping, however, and the optimum damping is a matter ofcompromise. •20 •h 15+ 10 + 50 9-105 L-15 -20-

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1