Hearing Loss & Equalization

Thanks Swamp. I'm sorry I can't answer that other than to say it's got to be 1 percent of them at best. Audiophiles with a little computer smarts and the interface device needed between the PC and the aids (called a HI-PRO) could adjust aids themselves. Too bad manufacturers don't offer this. I can understand why with lawsuits and all.

I always take private emails to answer any questions I can for people.

ET

Stevcham: the level is higher than 80 dB - but how high depends on the length of time you are exposed to the sound. A lot of sites on the internet can provide this info - try sites such as the Mayo clinic, audiology society etc.

I found out that 85 dB seems to be the "cutoff" for unlimited extended listening, but what is not mentioned is that peak dB or nominal or average listening level?

I try to keep it under 80 for most of my listening. What I regret the most is those few times as a kid my Dad took me skeet shooting with a 12 gauge and not providing me with ear protection. I believe that probably knocked off a few dB permanently. Also, all those rock concerts I attended in Boston Garden while in high school in the 70s, yikes the sound quality alone if I heard it today, regardless of SPL and relative to today's PA systems, would have me running for the door!

Also high bass levels are very damaging due to the displacement such SPLs place on the eardrum, bones and hair cells.

Assuming you found the 85 dB at a site that simply referred to spl levels and time, then the 85 dB means constant - like standing 30 feet from a jackhammer all day and all night with the jackhammer never shutting off. A short term value will be higher - for eg. if you stand next to a cannon - one shot at 140 dB can permanently damage your hearing.