Cinematographic annual : 1930 (1930)

Record Details:

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RCA PHOTOPHONE SYSTEM 357 Percent Da Flection of Vibrator Percent Deflection of Vibrator h * r <*> ^ _ , , '-+" ~X 4 or \ fc S3 i-?~:r?|| .rn-; fc : Otr "AH"~" 0J? 0* 01 . ' . • i." *< -.: 'J '■ — -~~-~ — ~— ??4-Sf^-^g^ ' 0% Oi \ =n =■■•.=?:■•: : ; V ^ * ■: 33 EE±i=^S5ES j 1 | j j : 1 j iJJ b. 00 1 : £ :j :I::::; 1 J> /O t t 1 | C _T_T 1 . m _j_ ±__ •? Ill H O -; i u ' ' Jl~ 11 1 -< f ±± T ±jt. 1 1 1 1 ■ " , ' ! II ^ r ! ts ..1, 00 € lllilll ESEEI EEIEEE SIE zmd^^rr +j±L — LL — -i_ J_^_ ±u s QOtr I 1 1 1 1 j : ! | — * OOS 001 ooL OOS 00 b 000/ ^l^P^ — _i_'__r_p: , ' y— 9 EEEE= IEEEEE EEE SaHEEEEEE^^ " i ' V "^^^ i "^^^M ' / 1 I !/! ^ : ^ & , >«■ «h ■ /; i i M>VV SS'S s ru / 3Hl r? K T* ^N J oooz <■? vj * V i! KJ ft i 4^*-4VH ' ft n RtJ *bt\ oooe r W joj i ( ooo h 5? v? : HHCrpp — t 00OJ O0O«J Ss cB ■ 1 | Q-7" c -OOL ooog, OOO b OOOOJ E^^!==§ll p= i ■ ~ y j 1 — I OOOH FIGURE 7 FIGURE 8 Figure 7 shows the relative sensitivity of the Photophone amplifier and vibrator combined when constant voltage is applied to the input of the amplifier. Figure 8 shows the relative sensitivity of the entire recording system consisting of microphone, amplifier and vibrator. This curve was determined by applying constant sound pressure to the microphone and measuring the output in terms of vibrator deflection.