142 



BELL SYSTEM TECHNICAL JOURNAL 



imiciAL response: 



FREQUENCY RESPONSE 



CAI^CULATCD /P£C£VI^€/P CHAI?ACT£I?/STICS 



lOOCO 



(Mf^v-sec) 



TJMe {M/C/Pa-S£C.) 



TME (wen-sec.) 



^ < 



Tff4E (WC/?0~S^) 



I. INDICIAL KSPO/JSE MB hs 

 FUEOuEtJcy /e^spOKse of 

 A P£SIST/lfJC£ CcrjreOLLED 



OF A MASS CONTROLLED 

 /?ECEIVEe. 

 3. iTIFFNESS COHTfiOLLeDy 

 RECEivelf 





TtME fMKXO-SEc) 



FeeQuehjcr- cj?s. 



rREQUENCY- C.P.S. 



^eeQcf£NCY-CPs. 



i 



Fe£Qf/£/^r-ap.s. 



FRSQUEf^r- C.PS 



Fig. 6 — Calculated indicial response versus calculated frequency response of various 

 types of telephone receivers. 



