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wtf why so loud?
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<blockquote data-quote="adamawayfrommpa" data-source="post: 9526" data-attributes="member: 541291"><p>This came from the site:</p><p></p><p><a href="http://www.abelard.org/hear/hear.htm" target="_blank">http://www.abelard.org/hear/hear.htm</a></p><p></p><p>HOW LOUD IS LOUD?</p><p></p><p>Common Noise Levels and Typical Reactions</p><p></p><p>Activity</p><p></p><p>Noise Level [dB(A)]</p><p></p><p>Apparent Loudness</p><p></p><p>Typical Physical Response</p><p></p><p>Rocket launching 180 Danger level</p><p></p><p>Threshold of pain</p><p></p><p>Gunshot</p><p></p><p>Jet engine taking off</p><p></p><p>140 Danger level</p><p></p><p>Military jet</p><p></p><p>Air raid siren</p><p></p><p>Shotgun</p><p></p><p>Hydraulic press (3 m away)</p><p></p><p>130</p><p></p><p>512 times as loud</p><p></p><p>Limited ability to hear amplified speech.</p><p></p><p>Noise may cause pain.</p><p></p><p>Can damage hearing after 3.75 minutes exposure per day</p><p></p><p>Car horn</p><p></p><p>Propeller aircraft</p><p></p><p>Air-raid siren 120 256 times as loud Can damage hearing after 7.5 minutes exposure per day</p><p></p><p>Sand-blasting</p><p></p><p>Squealing pigs</p><p></p><p>Inboard motorboat</p><p></p><p>Typical night club</p><p></p><p>Unsilenced motorcycle (7m away)</p><p></p><p>110</p><p></p><p>Over 128 times as loud!!</p><p></p><p>Maximum vocal effort.</p><p></p><p>Can damage hearing after 30 minutes exposure per day</p><p></p><p>Amplified Rock Music 110-130 Over 128 to 512 times as loud!! Can damage hearing after</p><p></p><p>3.75 – 30 minutes</p><p></p><p>exposure per day</p><p></p><p>Helicopter</p><p></p><p>Motorised/power mower 105 Can damage hearing after 1 hour</p><p></p><p>exposure per day</p><p></p><p>Jet takeoff @ 500m</p><p></p><p>Train horn @ 30m</p><p></p><p>Diesel truck</p><p></p><p>Pneumatic drill/jackhammer</p><p></p><p>100</p><p></p><p>64 times as loud</p><p></p><p>Can damage hearing after 2 hours exposure per day</p><p></p><p>Heavy truck @ 15m</p><p></p><p>Busy city street</p><p></p><p>passing motorcycle</p><p></p><p>Lawn mower</p><p></p><p>Loud shout</p><p></p><p>Sreaming child</p><p></p><p>90</p><p></p><p>32 times as loud</p><p></p><p>Very annoying.</p><p></p><p>Can damage hearing after</p><p></p><p>8 hours exposure per day</p><p></p><p>Average factory</p><p></p><p>Electric shaver 85</p><p></p><p>Busy traffic intersection</p><p></p><p>Motorway construction site</p><p></p><p>Outboard motor</p><p></p><p>Alarm clock (with bell)</p><p></p><p>Freight train (15m away)</p><p></p><p>80</p><p></p><p>16 times as loud</p><p></p><p>Annoying .</p><p></p><p>Motorway traffic @ 15m</p><p></p><p>Roadside traffic</p><p></p><p>Train horn @ 500m</p><p></p><p>Vacuum cleaner</p><p></p><p>Mixer</p><p></p><p>electric sewing machine</p><p></p><p>Noisy restaurant</p><p></p><p>Conversation in a loud voice</p><p></p><p>70</p><p></p><p>8 times as loud</p><p></p><p>Telephone use difficult.</p><p></p><p>Washing machine/dishwasher 65</p><p></p><p>Light car traffic @ 15m</p><p></p><p>City or commercial areas</p><p></p><p>Noisy office</p><p></p><p>Normal conversation</p><p></p><p>Clothes dryer</p><p></p><p>Background music</p><p></p><p>60</p><p></p><p>4 times as loud</p><p></p><p>Intrusive.</p><p></p><p>Quiet office</p><p></p><p>50</p><p></p><p>2 times as loud</p><p></p><p>Speech interference.</p><p></p><p>Refrigerator 45</p><p></p><p>Quiet residential area</p><p></p><p>Kitchen/bathroom</p><p></p><p>Public library</p><p></p><p>40</p><p></p><p>Arbitrary Base</p><p></p><p>Reference Level</p><p></p><p>Quiet .</p><p></p><p>Leaves rustling</p><p></p><p>Very soft music</p><p></p><p>Recording studio</p><p></p><p>Living/dining/bedroom</p><p></p><p>30</p><p></p><p>1/2 as loud</p><p></p><p>Very quiet.</p><p></p><p>Threshold of sound perception</p><p></p><p>10</p><p></p><p>1/8 as loud</p><p></p><p>Just audible.</p><p></p><p>Threshold of hearing</p><p></p><p>0</p><p></p><p>N/A</p><p></p><p>Not audible.</p><p></p><p>From Adam Chandler</p><p></p><p>My site:</p><p></p><p><a href="http://www.angelfire.com/electronic2/adam2000" target="_blank">http://www.angelfire.com/electronic2/adam2000</a></p><p></p><p>My email:</p><p></p><p>adamawayfrommpa2000</p></blockquote><p></p>
[QUOTE="adamawayfrommpa, post: 9526, member: 541291"] This came from the site: [URL="http://www.abelard.org/hear/hear.htm"]http://www.abelard.org/hear/hear.htm[/URL] HOW LOUD IS LOUD? Common Noise Levels and Typical Reactions Activity Noise Level [dB(A)] Apparent Loudness Typical Physical Response Rocket launching 180 Danger level Threshold of pain Gunshot Jet engine taking off 140 Danger level Military jet Air raid siren Shotgun Hydraulic press (3 m away) 130 512 times as loud Limited ability to hear amplified speech. Noise may cause pain. Can damage hearing after 3.75 minutes exposure per day Car horn Propeller aircraft Air-raid siren 120 256 times as loud Can damage hearing after 7.5 minutes exposure per day Sand-blasting Squealing pigs Inboard motorboat Typical night club Unsilenced motorcycle (7m away) 110 Over 128 times as loud!! Maximum vocal effort. Can damage hearing after 30 minutes exposure per day Amplified Rock Music 110-130 Over 128 to 512 times as loud!! Can damage hearing after 3.75 – 30 minutes exposure per day Helicopter Motorised/power mower 105 Can damage hearing after 1 hour exposure per day Jet takeoff @ 500m Train horn @ 30m Diesel truck Pneumatic drill/jackhammer 100 64 times as loud Can damage hearing after 2 hours exposure per day Heavy truck @ 15m Busy city street passing motorcycle Lawn mower Loud shout Sreaming child 90 32 times as loud Very annoying. Can damage hearing after 8 hours exposure per day Average factory Electric shaver 85 Busy traffic intersection Motorway construction site Outboard motor Alarm clock (with bell) Freight train (15m away) 80 16 times as loud Annoying . Motorway traffic @ 15m Roadside traffic Train horn @ 500m Vacuum cleaner Mixer electric sewing machine Noisy restaurant Conversation in a loud voice 70 8 times as loud Telephone use difficult. Washing machine/dishwasher 65 Light car traffic @ 15m City or commercial areas Noisy office Normal conversation Clothes dryer Background music 60 4 times as loud Intrusive. Quiet office 50 2 times as loud Speech interference. Refrigerator 45 Quiet residential area Kitchen/bathroom Public library 40 Arbitrary Base Reference Level Quiet . Leaves rustling Very soft music Recording studio Living/dining/bedroom 30 1/2 as loud Very quiet. Threshold of sound perception 10 1/8 as loud Just audible. Threshold of hearing 0 N/A Not audible. From Adam Chandler My site: [URL="http://www.angelfire.com/electronic2/adam2000"]http://www.angelfire.com/electronic2/adam2000[/URL] My email: adamawayfrommpa2000 [/QUOTE]
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wtf why so loud?
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