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A-WEIGHTED <br /> SOUND PRESSURE LEVEL, <br /> IN DECIBELS <br /> 140 <br /> 130 THRESHOLD OF PAIN <br /> CIVIL DEFENSE SIREN (100') <br /> JET TAKEOFF(200') 120 <br /> RIVETING MACHINE 110 <br /> ROCK MUSIC BAND <br /> DIESEL BUS(15') 100 PILEDRIVER(50') <br /> AMBULANCE SIREN (100') <br /> BAY AREA RAPID TRANSIT 90 <br /> TRAIN PASSBY(10') BOILER ROOM <br /> OFF HIGHWAY VEHICLE (50') PRINTING PRESS PLANT <br /> PNEUMATIC DRILL(50') ® GARBAGE DISPOSAL IN THE HOME <br /> SF MUNI LIGHT-RAIL VEHICLE(35') 70 INSIDE SPORTS CAR, 50 MPH <br /> FREIGHT CARS (100') <br /> VACUUM CLEANER(10') 60 DATA PROCESSING CENTER <br /> SPEECH (1') DEPARTMENT STORE <br /> 50 PRIVATE BUSINESS OFFICE <br /> LARGE TRANSFORMER(200') 40 LIGHT TRAFFIC(100') <br /> AVERAGE RESIDENCE <br /> TYPICAL MINIMUM NIGHTTIME <br /> 30 LEVELS-RESIDENTIAL AREAS <br /> SOFT WHISPER(5') <br /> 20 <br /> RUSTLING LEAVES RECORDING STUDIO <br /> 10 <br /> THRESHOLD OF HEARING MOSQUITO(3') <br /> 0 <br /> (100')= DISTANCE IN FEET <br /> BETWEEN SOURCE <br /> AND LISTENER cl •R z N z ou N(. <br /> C3 AGCUSLCAL .,M,N 14FOR AA-_C.J r,N_! <br /> ICL SOUND LEVELS FICO l <br /> MEASURED IN THE <br /> ENVIRONMENT AND INDUSTRY <br /> " _' C °)`Jie „lreet ;.ori Ft-,n 1,o, <br />