Speech
I. INTROOUCnONT h e characterization of speech signal power on Bell S y s t e m message circuits is a n essential s t e p in t h e d e t e r m i n a t i o n of signal power loading a n d crosstalk objectives. Knowledge of speech signal characteristics is also i m p o r t a n t t o designers of a wide variety of t e l e c o m m u n i c a t i o n s e q u i p m e n t .Speech levels a t t h e class 5 office were last characterized in t h e 1960 Speech Volume Survey 1 in terms of volume units (VU). In t h e years since 2695
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