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TYPICAL SOUND LEVELS MEASURED IN THE ENVIRONMENT AND INDUSTRY <br /> A-Weighted <br /> At a Given Distance Sound Level Subjective <br /> From Noise Source in Decibels Noise Environments Impression <br /> 140 <br /> Civil Defense <br /> Siren (100') 130 <br /> Pain <br /> Jet Takeoff (200') 120 Threshold <br /> 110 Rock Music Concert <br /> Pile Driver (50') 100 Very <br /> Ambulance Siren (100') Loud <br /> 90 Boiler Room <br /> Freight Cars (50') Printing Press Plant <br /> Pneumatic Drill (50') 80 In Kitchen with Garbage <br /> Freeway (100') Disposal Running <br /> 70 Moderately <br /> Loud <br /> Vacuum Cleaner (10') 60 Data Processing Center <br /> Department Store <br /> Light Traffic (100') 50 Private Business Office <br /> Large Transformer (200') <br /> 40 Quiet <br /> Soft Whisper (5') 30 Quiet Bedroom <br /> 20 Recording Studio <br /> 10 Threshold <br /> of Hearing <br /> 0 <br />