1-- i I ( . "\ , ",,' I L - Sound level distribution ot 125 CPS (Sound level reoding volue: 80 db =0) ---'- Sound level distribution ot 500 CPS (Sound level reoding volue. 77 db I '" ,\ 01 \ 1 r-----------,I I H" Sound level distribution at 2000 CPS (Sound level reading value: 6 Figure 3: SOUND LEVEL DISTRIBUTIONS. 73 db =0) Sound level distribution at full ronge (Sound level reading value: Howard C. Balewin Memorial Pavilian, Meadow Brook Music Festival, Rochester, Michigan C Polycyflnd,icol shell set up for choral concert at the Erlanger Theatre in Philadelphia feo! uary 1966 23 76 db = 0)