- Jun 19, 2013
- 177
- 43
- Tinnitus Since
- 06/2009
- Cause of Tinnitus
- Acoustic trauma
What's the best protection in regards to db? Would the cheap and simple foam plugs do a better job if the goal is to exclude noise?
Custom molded earplugs are faster to plug because they fit your ear. There are models with filter, no filter, music earphones, electronic filtering, some even have some of those as interchangeable pieces. I don't think they are better than foam plugs, but I'm not an expert. I used foam plugs myself in a flight two days ago, and I could tell by my perception of the engine noise that they did a good job. Molded plugs draw less questions from people because they look like music earplugs, or some hearing aid.
I couldn't find much info on the limits of noise attenuation.
It's available online at http://www.audiologyonline.com/articles/extra-protection-wearing-earmuffs-and-1218 It's a short read:
One study, of which the author is aware, suggests that the highest attenuation in terms of an NRR-like number, that can realistically be obtained for about 84% of the population, is about 25 dB (Hachey and Roberts, 1983). This was observed in one study of a foam earplug worn in combination with a small-volume plastic earmuff. Thus when TWAs exceed about 110 dB, even dual protection is likely to be inadequate.