It's correct though... My Sordin's are remarkably better on me than the HL's.
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No idea who Trevor is but everyone that uses them survives without hearing damage. I would try them out in person versus comparing potentially arbitrary NRR numbers.
I'm a bit paranoid about losing my hearing and I don't lose sleep over using Sordins (at least in USPSA).
It's posted on the internet so it must be true.
Sordin's big advantage seems to be in the fit of their cushions, especially the gel jobs.
HLs don't get as good a seal.
Trevor is the guy who did a blog to "prove" that an 18 dB Sordin was just as good as a 30 dB muff.
He did this by cherry picking the damping from the specific frequency ranges he found to contribute the most to muzzle blast. He came up with a gun rating of about 35. Great for him and you. Better than the 30 dB of my old Peltors. But wait, there's more. If you use only the same frequency bands he did, the Peltor comes out with a Trevor Rating of about 44.
I am unwilling to pay the price of a set of Sordins to compare. Maybe somebody would give me some to try.
Correct. They need to seal for the higher rating to be valid.
Here's a graph because people like pictures. Source data came from each manufacturer's website.
https://i.imgur.com/X9Iluvq.png
https://i.imgur.com/ZWSXDYX.png
The Comtac 3 is the "other" Sordin style option. Never used them but they also seem to have happy customers.
I find the Gel cups on my Sordins vastly superior to the vinyl of my Impact Pros, especially fitting around my glasses.
Wearing my Sordins all day at a training class is also much more comfortable.
And I’ll tell one more thing, where we need a good ventilating battery driven micro-fan is not in a dad gone holster like AG is getting roasted over, but in the ear cups of ear pro. Think about how nice it would be to not has sweaty ears, and a nice cool gentle fresh breeze flowing through your match or training day.