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Common Outdoor Noise Level Common Indoor <br /> Activities (dBA) Activities <br /> 110 Rock Band <br /> Jet Fly-over at 300m (1000 ft)-) <br /> 100 <br /> Gas Lawn Mower at 1 m (3 ft) <br /> 90 <br /> Diesel Truck at 15 m (50 ft). Food Blender at 1 m (3 ft) <br /> at 80 km (50 mph) 80 Garbage Disposal at 1 m (3 ft) <br /> Noisy Urban Area. Daytime <br /> Gas Lawn Mower. 30 m (100 ft) 70 Vacuum Cleaner at 3 m (10 ft) <br /> Commercial Area Normal Speech at 1 m (3 ft) <br /> Heavy Traffic at 90 m (300 ft) 60 <br /> Large Business Office <br /> Quiet Urban Daytime 50 Dishwasher Next Room <br /> Quiet Urban Nighttime 40 Theater. Large Conference <br /> Quiet Suburban Nighttime Room (Background) <br /> Library <br /> Quiet Rural Nighttime 30 Bedroom at Night. <br /> Concert Hall (Background) <br /> 20 Broadcast/Recording Studio <br /> 10 <br /> Lowest Threshold of Human Lowest Threshold of Human <br /> Hearing Hearing <br /> Source: California Department of Transportation (Caltrans) 2012 <br /> ECORP Consulting, Inc. Figure 4.15-1. Common Noise Levels <br /> ENVIRONMENTAL CONSULTANTS Gill Medical Center <br />