Jet take-off (at 25 meters) Recommended product: Outdoor Noise Barriers
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150
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Eardrum rupture
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Aircraft carrier deck
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140
|
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Military jet aircraft take-off from aircraft carrier with afterburner at 50 ft (130 dB).
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130
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Thunderclap, chain saw. Oxygen torch (121 dB).
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120
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Painful. 32 times as loud as 70 dB.
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Steel mill, auto horn at 1 meter. Turbo-fan aircraft at takeoff power at 200 ft (118 dB). Riveting machine (110 dB); live rock music (108 - 114 dB).
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110
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Average human pain threshold. 16 times as loud as 70 dB.
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Jet take-off (at 305 meters), use of outboard motor, power lawn mower, motorcycle, farm tractor, jackhammer, garbage truck. Boeing 707 or DC-8 aircraft at one nautical mile (6080 ft) before landing (106 dB); jet flyover at 1000 feet (103 dB); Bell J-2A helicopter at 100 ft (100 dB).
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100
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8 times as loud as 70 dB. Serious damage possible in 8 hr exposure.
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Boeing 737 or DC-9 aircraft at one nautical mile (6080 ft) before landing (97 dB); power mower (96 dB); motorcycle at 25 ft (90 dB). Newspaper press (97 dB).
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90
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4 times as loud as 70 dB. Likely damage in 8 hour exposure.
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Garbage disposal, dishwasher, average factory, freight train (at 15 meters). Car wash at 20 ft (89 dB); propeller plane flyover at 1000 ft (88 dB); diesel truck 40 mph at 50 ft (84 dB); diesel train at 45 mph at 100 ft (83 dB). Food blender (88 dB); milling machine (85 dB); garbage disposal (80 dB).
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80
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2 times as loud as 70 dB. Possible damage in 8 hour exposure.
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Passenger car at 65 mph at 25 ft (77 dB); freeway at 50 ft from pavement edge 10 a.m. (76 dB). Living room music (76 dB); radio or TV-audio, vacuum cleaner (70 dB).
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70
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Arbitrary base of comparison. Upper 70s are annoyingly loud to some people.
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Conversation in restaurant, office, background music, Air conditioning unit at 100 feet.
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60
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Half as loud as 70 dB. Fairly quiet.
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Quiet suburb, conversation at home. Large electrical transformers at 100 feet.
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50
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One-fourth as loud as 70 dB.
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Library, bird calls (44 dB); lowest limit of urban ambient sound
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40
|
One-eighth as loud as 70 dB.
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Quiet rural area.
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30
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One-sixteenth as loud as 70 dB. Very Quiet.
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Whisper, rustling leaves
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20
|
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Breathing
|
10
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Barely audible
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A MUST SEE video (Dangerous companions, 51 minutes) with Kevin Richardson can be found here (scroll down to 2nd vid):
http://landofpuregold.wordpress.com/2010/08/06/great-films-from-the-lion-whisperer/
His official homepage is here:
http://www.lionwhisperer.co.za/