14 
THIRD-OCTAVE BAND LEVEL, DB 
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oO 
1 
DO 
oO 
-30 
PEM GIUTCINS 6 Sonagrams, oscillogramsS, and spectrum 
plot of Sound 3, Motorboating. The sound is 
DOGOSGOOGLNY CO jIBISG Crota WEG CG jwulSG TrOCe OF MS 
OICHTERMSIEICHs The 15-sec Sonagram with its effective 
3 c/s filtering shows about 20 frequency com- 
DOME ILS) (OG LSC SiG CAGE Sac Me mlOnie Marto c/s 
DOUMRE) OY Gr CMe Seronges bo OREM EC GRYUBG BB C= 
ROL COn 32 SCCR Gb O5655 425655 18505 Grd 1557 8ee 
on this Sonagram. In the 4-sec Sonagram, which 
WAS MACE with Only a2) tO da Sedan (Ofa iven Cape 
playback (22 c/s effective filter-width), weak 
CUCM CTL ON GUSH. Gd eB Gvalndi GMSHIG ULL SNC Qe DCM STELeHTe cir 
the background. 
10,000 
