Highest dB Reduction with Hearing Protection?

Discussion in 'Support' started by Earing, Jul 10, 2019 at 5:04 AM.

    1. Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      I bought the highest rated NNR ear muffs I could get. They are the Browning ear muffs at 37dB. Then I use foam plugs at about 30 dB. From the formulas I found here and on other sites you take the highest rated of the two, subtract 7 and divide by 2. That equals 15. That is the true amount of dB reduction. Then the foam plugs even though they are rated 30, I can only subtract another 5dB. So the most I can get is a 20dB reduction. My equipment is rated by the manufacturer at 110 and 116. They probably go louder, because you can't trust a corporation to be honest about their products.

      Is there any way to get more than a 20dB reduction? I will not be using this equipment anymore, but I am wondering can I get a higher protection reduction than the 20dB?
       
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    2. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      After some online searching it seems like that might be the best it can get. Some sites take the NNR rating at its advertised amount, but that has to be wrong. There seems to be agreement about the extra amount the 2nd set give. (Another 5dB reduction.)
       
      • Agree Agree x 1
    3. PortalNaut

      PortalNaut Member

      Location:
      USA
      Tinnitus Since:
      Late 2/2018
      Cause of Tinnitus:
      Noise Induced
      Are you sure that formula is applicable to earmuffs? The reduction is due to people not using/wearing/inserting ear protection correctly, and earmuffs are pretty simple to use properly.

      As I recall when people double up on protection, the basic rule of thumb was the nrr of the earmuffs, plus about another 5 for the earplugs. Maybe it's not correct, but on the other hand, shooting guns at 160db with only 20db of protection would be pretty bad.

      This other discussion has a new EPA level label towards the last few posts, where you can see there is a range for the quality of the "insertion/installation."
      https://www.tinnitustalk.com/threads/are-foam-earplugs-the-best-plugs-for-concerts.35549/
       
    4. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      Yes
       
    5. another sean
      Studious

      another sean Member Benefactor

      Location:
      Los Angeles
      Tinnitus Since:
      2015
      Cause of Tinnitus:
      Long duration of low audio
      These are garbage. Their dB rating is a false claim. You can find 10 more of the same exact ear muffs under a different brand name on Amazon. The best ones are the 3M Peltor X5A.
       
    6. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      I did get 2 pair of the 3M Peltors, but the Brownings are a little bit quieter. On the drive home I was checking them on the highway with my radio, and the 3M let more of the radio voice sound through. My car is very noisy and I was cranking the radio to the same volume #. Could you show me some of the ear muffs that are the same? I paid $60 Canadian for the Brownings and the Peltors were under $35.
       
    7. PortalNaut

      PortalNaut Member

      Location:
      USA
      Tinnitus Since:
      Late 2/2018
      Cause of Tinnitus:
      Noise Induced
      • Informative Informative x 1
    8. Digital Doc

      Digital Doc Member

      Tinnitus Since:
      2018
      Cause of Tinnitus:
      noise induced
      If you want the top noise reduction, then you need to start with a top earplug. The best ones have a NRR 33 rating, and you mentioned NRR30 ones.
       
    9. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      (33-7) x .5 = 13dB
      (30 -7) x .5 = 11.5dB
      Difference in dB between the two is 1.5dB

      But it doesn't matter. The when using 2 sets of plugs, you take the highest pair, and do the formula. The most you can subtract for the 2nd pair is 5dB.

      The most you can possibly reduce the dB is 20dB. That is with the 37dB ear muffs and whatever foam plugs at 5dB for the 2nd set.

      I will make a point to find the best foam plugs. I am just guessing at 30 for the ones I have. They could be 32 or 33dB ones.
       
    10. Bill Bauer
      No Mood

      Bill Bauer Member Hall of Fame

      Tinnitus Since:
      February, 2017
      Cause of Tinnitus:
      Acoustic Trauma
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    11. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      I don't know, but I think I will use the lowest reduction, because I used 37dB muffs with a pair of quality foam plugs at about 32dB. I ran my Stihl brush trimmer for about 30 minutes and I probably won't recover. Stihl claims the trimmer is at 110dB. If I was getting the anything close to the numbers the plugs are rated at there should be no problem.

      I will add I thought the trimmer was at 100dB, not 110. My mistake for not digging around and finding the dB of the tool I was using. I am selling my chainsaw, my brush trimmer, and my wood splitter.
       
    12. Bill Bauer
      No Mood

      Bill Bauer Member Hall of Fame

      Tinnitus Since:
      February, 2017
      Cause of Tinnitus:
      Acoustic Trauma
      You will be able to know whether or not you will recover only about a month after the event. Temporary spikes can last longer than three months, and most begin to fade after a month. Right now it is reasonable to assume that your spike is temporary.

      I believe that one shouldn't think too much about those dB ratings. You could use trial and error to get a sense of what is and what isn't safe for you and act accordingly...
       
    13. Bill Bauer
      No Mood

      Bill Bauer Member Hall of Fame

      Tinnitus Since:
      February, 2017
      Cause of Tinnitus:
      Acoustic Trauma
      There is a good chance that after 2 years or so you will become more resilient (although just because a sound doesn't produce an immediate spike doesn't mean that it is completely safe - personally I plan to not push the boundaries). It makes sense to avoid all noise exposures that you can easily avoid (get other people to use those tools).
       
    14. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise
      With my new knowledge about noise and hearing protection I am not feeling good about hiring others when I know they are going to hurt themselves toiling for me. I did find someone to do it, but I don't feel good about it.

      I did some research and there is a corded electric chainsaw that is as powerful as the gas units. My Stihl is rated at 116dB, and the electric Stihl is 96B. that's a good start, a 20dB reduction. With double plugs the running dB could be 76dB. I will not be doing this work though. Too much risk.
       
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    15. Bill Bauer
      No Mood

      Bill Bauer Member Hall of Fame

      Tinnitus Since:
      February, 2017
      Cause of Tinnitus:
      Acoustic Trauma
      Good point. I think that a healthy person wearing hearing protection ought to be ok, but of course there is no way of knowing just how much noise exposure that person had had, and how healthy they really are.
       
    16. another sean
      Studious

      another sean Member Benefactor

      Location:
      Los Angeles
      Tinnitus Since:
      2015
      Cause of Tinnitus:
      Long duration of low audio
      And they were the X5A?

      here are others of the same ear muffs under a different brand name

      https://www.amazon.com/ClearArmor-141001-Shooters-Protection-Folding-Padded/dp/B00NKSMPZW/
      https://www.amazon.com/dp/B06XMY7KC2/
      https://www.amazon.com/Tvoip-35dB-Highest-Safety-Muffs/dp/B07GPGH5PP/
      https://www.amazon.com/Silence-industrial-shooting-protection-Lightweight/dp/B018F4FS72/
      https://www.amazon.com/gp/product/B07H2LCZXH/
      https://www.amazon.com/Browning-12699-Hearing-Protector-HDR/
       
      • Informative Informative x 1
    17. AUTHOR
      AUTHOR
      Earing
      No Mood

      Earing Member

      Tinnitus Since:
      2010
      Cause of Tinnitus:
      noise

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