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someone clear this for me.

Discussion in 'Shooting Gear and Storage' started by Kangspec, May 12, 2009.

  1. Kangspec

    Kangspec New Member

    Mar 30, 2009
    i got this off from this forum
    Gradual hearing loss may occur after prolonged exposure to 90 decibels or above.

    Exposure to 100 decibels for more than 15 minutes can cause hearing loss.

    Exposure to 110 decibels for more than a minute can cause permanent hearing loss.

    At 140 dBA noise causes immediate injury to almost any unprotected ear.

    There is also the more extreme ‘acoustic trauma’, which is an immediate loss of hearing after a sudden, exceptionally loud noise such as an explosion.

    Noise levels of firearms:
    .22 caliber rifle 130dB
    .223, 55GR. Commercial load 18" barrel 155.5dB
    .243 in 22" barrel 155.9dB
    .30-30 in 20" barrel 156.0dB.
    7mm Magnum in 20" barrel 157.5dB.
    .308 in 24" barrel 156.2dB.
    .30-06 in 24" barrel 158.5dB. In 18" barrel 163.2dB.
    .375 18" barrel with muzzle brake 170 dB.
    .410 Bore 28" barrel 150dB. 26" barrel 150.25dB. 18" barrel 156.30dB.
    20 Gauge 28" barrel 152.50dB. 22" barrel 154.75dB.
    12 Gauge 28" barrel 151.50dB. 26" barrel 156.10dB. 18" barrel 161.50dB.
    .25 ACP 155.0 dB.
    .32 LONG 152.4 dB.
    .32 ACP 153.5 dB.
    .380 157.7 dB.
    9mm 159.8 dB.
    .38 S&W 153.5 dB.
    .38 Spl 156.3 dB.
    .357 Magnum 164.3 dB.
    .41 Magnum 163.2 dB.
    .44 Spl 155.9 dB.
    .45 ACP 157.0 dB.
    .45 COLT 154.7 dB.

    so, if iam wearing NRR 32 ear muff and shooting 9mm (159.8db). iam getting 127.8db to my ear. and it's still dangerous level. how this works?
  2. BHP FAN

    BHP FAN Mentor

    Sep 23, 2008
    Northern California
    wear plugs and muffs.
  3. Hungry Seagull

    Hungry Seagull member

    Feb 19, 2009
    Im already deaf to anything below 90 Db. I wear muffs to kill the magnum pain and pressure. I also take the hearing aids out and put plugs into the ears, then the muffs.

    After a shoot it takes about a month to clear out the hells bells in the head.

    There is a very big difference between a airliner taking off today (A Boeing 737) than the mid 70's 727's those things had a shriek prior to noise laws, never mind some of the larger aircraft and military jets.

    I never mind loud noises like airshows, shoots and reenactments... that to me is the sound of Freedom. Not a problem.
  4. 1KPerDay

    1KPerDay Elder

    Jan 19, 2006
    Happy Valley, UT
    It's dangerous if prolonged. The length of time spent at 127db is the issue.

    It's also important to note that if you're wearing earplugs, you should make sure you're wearing them correctly; i.e., deep. Roll them small, lift up on the top of the ear with your other hand, and insert them well into the canal and let them expand. They should feel like they're almost touching your brain.

    Most people I've seen sort of put the tips in the outside part of their ear canal... probably get about 10db NR that way. I used mine wrong for many years until I actually read the instructions on the Howard Leight Max I use. Made a BIG difference.

    Yeah, muffs over plugs is a great idea, particularly if shooting at indoor ranges. :cool:
  5. dagger dog

    dagger dog Senior Member

    Jan 30, 2008
    SO. IN
    The finned silicone plugs work well with muffs and are easier to insert, a little saliva for lubricant and they will slip right into the canal with out any force or rolling and they actually stop the noise either. The foam disposables work better as fishing bobbers. I can never get them to insert deep enough to do any good. The moldable silicone swimmers type do little to stop the dangerous noise.

    I have the Peltor electronic 6 series, and they are only rated at 21, the higher end muffs have a higher rating than most of the electronics at
    29 -30's. The pricing on the electronics is cheap enough these days every one should be able to afford them, and along with plugs will keep your hearing sound. Pun intended:D

    As I sit here typing this reply the ringing in my right ear is very audible.
    It is from nerve damage within the inner ear , caused by ONE SHOT from a .38 Special revolver, I also have about one third hearing loss in the middle frequency ranges in that same ear and it is geting worse every day.
    The revolver was about even with and on a plane with and 6" from that ear when the shot went off.If anyone reading this has had any similar experiance you know what I mean when I say it felt like someone drove an ice pick into my right ear drum, unbelieveable pain, incapacition for at least 10 minutes and the person that fired the round thought he had shot me in the head as I fell to one knee as if pole axed.

    Hearing protection is not something to take lightly you must preserve yours and others hearing by wearing protection, and being aware of others on the firing line before pulling off an errant shot that could do irreversible damage!
  6. 1KPerDay

    1KPerDay Elder

    Jan 19, 2006
    Happy Valley, UT
    I bet you wanted to pole axe him...
  7. jimmyraythomason

    jimmyraythomason Mentor

    Dec 19, 2006
    I am suffering a certain amount of hearing loss because of shooting a .357mag without hearing protection. Happened in the early '70s when I was 10 feet tall and bullet-proof.
  8. edelbrock

    edelbrock Member

    Mar 2, 2009
    plugs and muffs if shooting indoors. Good muffs should cover it outdoors.

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