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<br />. <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1 <br />r <br /> <br />I <br /> <br />COMMON INDOOR AND <br />OUTDOOR NOISE LEVELS <br /> <br />COMMON OUTDOOR NOISE <br />LEVELS <br /> <br />NOISE LEVEL <br />(dBA) <br /> <br />COMMON INDOOR NOISE <br />LEVELS <br /> <br />--- 110 <br /> <br />Rock Band <br /> <br />Jet Flyer at 30.5 m (100 Ft.) <br /> <br />--- 100 <br /> <br />Gas Lawn Mower at 0.9 m (3 Ft.) <br /> <br />Inside Subway Train <br />(New York) <br /> <br />--- 90 <br /> <br />Diesel Trock at 15 m (50 Ft.) <br /> <br />Food Blender at 0.9 m (3 FtJ <br /> <br />--- 80 <br /> <br />Garbage Disposal at 0.9 m (3 Ft.) <br />Shouting at 0.9m (3 Ft.) <br /> <br />Noisy Urban Daytime <br /> <br />--- 70 <br /> <br />Vacuum Cleaner at 3 m (10 FU <br /> <br />Gas Lawn Mower at 30.5 M <br />(100 Ft.) <br /> <br />Nonnal Speech at 0.9 m (3 FtJ <br /> <br />--- 60 <br /> <br />Large Business Office <br /> <br />--- 50 <br /> <br />Dishwasher Next Room <br /> <br />Quiet Urban Daytime <br /> <br />--- 40 <br /> <br />Smal1 Theatre Large Conference <br />Room (Background) <br /> <br />Quiet Urban Nighttime <br /> <br />Quiet Suburban Nighttime <br /> <br />Library <br /> <br />--- 30 <br /> <br />Bedroom at Night <br /> <br />Quiet Rural Nighttime <br /> <br />Concert Hall (Background) <br /> <br />--- 20 <br /> <br />Broadcast and Recording Studio <br /> <br />--- 10 <br /> <br />Threshold of Hearing <br /> <br />n_ 0 <br /> <br />Source: <br /> <br />Guide on Evaluation and Attenuation of Traffic Noise; American Association of State <br />Highway and Transportation Officials; March 1985. <br /> <br />20 <br />