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rrneck

(17,671 posts)
40. Youtube video and other information.
Sun Dec 30, 2012, 01:00 PM
Dec 2012


http://www.chem.purdue.edu/chemsafety/Training/PPETrain/dblevels.htm

Noise Sources and Their Effects

Jet take-off (at 25 meters) 150 Eardrum rupture

Aircraft carrier deck 140

Military jet aircraft take-off from aircraft carrier with afterburner at 50 ft (130 dB). 130

Thunderclap, chain saw. Oxygen torch (121 dB). 120 Painful. 32 times as loud as 70 dB.

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). 110 Average human pain threshold. 16 times as loud as 70 dB.

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). 100 8 times as loud as 70 dB. Serious damage possible in 8 hr exposure
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). 90 4 times as loud as 70 dB. Likely damage 8 hr exp

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). 80 2 times as loud as 70 dB. Possible damage in 8 h exposure.


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). 70 Arbitrary base of comparison. Upper 70s are annoyingly loud to some people.

http://en.wikipedia.org/wiki/Suppressor
Real world data

Live tests by independent reviewers of numerous commercially available suppressors find that even low caliber unsuppressed .22 LR handguns produce gunshots over 160 decibels.[14] In testing, most of the suppressors reduced the volume to between 130 and 145 dB, with the quietest suppressors metering at 117 dB. The actual suppression of sound ranged from 14.3 to 43 dB, with most data points around the 30 dB mark. A notable example is the De Lisle carbine, a British World War II suppressed rifle used in small numbers by Special Forces. This was recorded at 85.5 dB in official firing tests.[15]

Comparatively, ear protection commonly used while shooting provides 18 to 32 dB of sound reduction at the ear.[16] Further, chainsaws, rock concerts, rocket engines, pneumatic drills, small firecrackers, and ambulance sirens are rated at 100 to 140 dB.[17]

While some consider the noise reduction of a suppressor significant enough to permit safe shooting without hearing protection ("hearing safe&quot , noise-induced hearing loss may occur at 85 time-weighted-average decibels or above if exposed for a prolonged period,[18] and suppressed gunshots regularly meter above 130 dB. However, the US Occupational Safety and Health Administration uses 140 dB as the "safety cutoff" for impulsive noise, which has led most US manufacturers to advertise sub-140 dB suppressors as "hearing safe." It should be noted that current OSHA standards would allow no more than sub single second exposure to impact noise over 130 dB per 24 hours. That would equate to a single .308 round fired through a very efficient can. This result effectively requires all users of suppressors to wear additional ear hearing protection.
Silencers: The NRA’s latest big lie [View all] babylonsister Dec 2012 OP
In Europe silencers are considered safety devices hack89 Dec 2012 #1
whatever happened to suppressors? Tuesday Afternoon Dec 2012 #3
Same thing. nt hack89 Dec 2012 #4
Europeans are so advanced. They even have Decent Health Care. Tuesday Afternoon Dec 2012 #9
Here If Shot, Raise Millions With Media Help Is The Answer otohara Dec 2012 #45
Europeans view guns very differently from the callous gun cultists here. Hoyt Dec 2012 #36
you don't read very well, or did you forget this- farminator3000 Dec 2012 #50
$3315 in 2011 dollars Spider Jerusalem Dec 2012 #61
sweet! farminator3000 Dec 2012 #67
FINLAND IS NOT IN EUROPE go away farminator3000 Dec 2012 #51
Finland not in Europe? CTyankee Dec 2012 #75
I can see Finland from my house! derby378 Dec 2012 #78
I wish the NRA could be silenced. TheCowsCameHome Dec 2012 #2
I'm sure the gungeoneers will be here shortly to tell us why they need silencers Hugabear Dec 2012 #5
there is almost no chance of sileners being deregulated rdking647 Dec 2012 #6
The dreaded silencer former-republican Dec 2012 #7
Predictable RomneyLies Dec 2012 #10
Former my foot. Ikonoklast Dec 2012 #23
? RomneyLies Dec 2012 #27
it is selling guns to children that is disgusting laughing boy farminator3000 Dec 2012 #52
Think of the children etherealtruth Dec 2012 #8
There is no justification for a silencer RomneyLies Dec 2012 #11
Ever use a evil silencer ? former-republican Dec 2012 #15
Yes, I have. RomneyLies Dec 2012 #18
Similar to the movies Tempest Dec 2012 #28
see #52 farminator3000 Dec 2012 #53
They're unregulated in Finland, Norway, and France and don't seem to be a problem there slackmaster Dec 2012 #12
Hey I'd let you have a silencer if you followed the REST of Norway's gun laws. Pholus Dec 2012 #16
I would take Norway's gun laws over California's any day slackmaster Dec 2012 #19
The asshole next door who has already been in front of a judge would never get his license Kolesar Dec 2012 #21
Norway vs. California Lizzie Poppet Dec 2012 #25
Maybe Norwegians are just nicer people than Californians are slackmaster Dec 2012 #31
Most gun cultists would flip out over Norway's laws, particularly almost total ban on public toting. Hoyt Dec 2012 #38
Random violent crime of all kinds is extremely rare in Norway slackmaster Dec 2012 #39
It's rare here too, for most of us. Some folks are paranoid, but that is another issue. Hoyt Dec 2012 #41
you vs. me farminator3000 Dec 2012 #54
So it sounds like we agree. Pholus Dec 2012 #34
As long as issuance of licenses is based on objective criteria only, I believe it's workable. slackmaster Dec 2012 #37
You like these restrictions (better than CA). Pholus Dec 2012 #43
There are some trade-offs, but on balance I like Norway's system better because I collect firearms. slackmaster Dec 2012 #44
I have read about Norway's gun control laws. CTyankee Dec 2012 #76
but guns are farminator3000 Dec 2012 #56
Collectors can't buy automatic weapons in California, but they can in Norway slackmaster Dec 2012 #80
this may be a good point, but let's keep focus on capacity and rounds/second, not on decibel levels maggiesfarmer Dec 2012 #13
Protect their hearing, while more of their peers are able to be mowed down? Ruby the Liberal Dec 2012 #14
Another classic example of the big lie from Zaitchik ProgressiveProfessor Dec 2012 #17
oh get off it farminator3000 Dec 2012 #57
The article was based on a false premise and got more facts wrong as it went along ProgressiveProfessor Dec 2012 #68
example please. just one... farminator3000 Dec 2012 #74
The development of silencers is tied to coup plots in the Caribbean. Kolesar Dec 2012 #20
Even with a suppressor/silencer, an AR-15 will do 100 decibels NickB79 Dec 2012 #22
Plus you'll have first round pop. ileus Dec 2012 #32
see #50 farminator3000 Dec 2012 #58
What! The NRA is not pushing for smokeless powder rock Dec 2012 #24
You obviously know very little about guns, MadHound Dec 2012 #26
"Silencers have legitimate safety uses in competitive shooting, especially at indoor ranges." Tempest Dec 2012 #29
You're shooting with some foolish people then. MadHound Dec 2012 #35
EVERY time I go to a range, I see other people using silencers. OneTenthofOnePercent Dec 2012 #48
BS see #50 farminator3000 Dec 2012 #60
Uhhh, not BS. I own silencers and I personally know about a dozen others. OneTenthofOnePercent Dec 2012 #79
Oh please MattBaggins Dec 2012 #33
OK - let me get this straight ThoughtCriminal Dec 2012 #42
see #50 farminator3000 Dec 2012 #59
We all know the last time a suppressor was used in a crime... ileus Dec 2012 #30
Youtube video and other information. rrneck Dec 2012 #40
nobody wants to watch or read that BS farminator3000 Dec 2012 #62
So you aren't interest in actual information. rrneck Dec 2012 #66
I AM i read the article and post #50 you are showing me magazine ads farminator3000 Dec 2012 #69
Youtube has audio. rrneck Dec 2012 #72
Kick Yo_Mama_Been_Loggin Dec 2012 #46
Silencers themselves are not dangerous. OneTenthofOnePercent Dec 2012 #47
TOTAL BS for pete's sake this is ridiculous farminator3000 Dec 2012 #63
Have you ever used a firearm, let alone a firearm with a silencer? OneTenthofOnePercent Dec 2012 #77
K/R* Redfairen Dec 2012 #49
Supressors are already regulated, taxed heavily, and registered - should be lauded iiibbb Dec 2012 #55
see #50 farminator3000 Dec 2012 #64
All #50 does is prove my point... iiibbb Dec 2012 #70
Post removed Post removed Dec 2012 #73
thanks! farminator3000 Dec 2012 #65
the ironic thing is... farminator3000 Dec 2012 #71
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