I'm certainly no expert here, but I've witnessed the affects of Loud Noises over a 20 year period via work. Our company participates in a hearing protection program and affords an audio test for employees via an onsite Audio Van. Not accurate as it would be in an office, but it is very effective to study hearing damage over a long period of time. At almost 69 years old I'm proud to say in that I have some loss, it's below normal for my age, and excellent considering my age. This is due to me always protecting my hearing though out my life.
As I have to review and sign off on all the employees results at the end of the tests, I can absolute see the affects of loud noises over a period of time. It's cumulative. Worst of them are the mechanics. None of them protect their hearing, and it shows. One mechanic in particular started with us in his mid 30's with consistent results of almost 0 loss. He always wore headset muffs. About 5 years later his family bought him some earbuds. He uses those earbuds under his earmuffs. At roughly 10 years since using them, He's greater then 50% loss over the entire spectrum. He's always asking you to repeat yourself when asking him a question. Again, it's cumulative.
Me, loud in my home is over 65db. Which is not to say once in a while I've been known to hit 75db or a little more. But not for prolonged periods.
Garry~
As I have to review and sign off on all the employees results at the end of the tests, I can absolute see the affects of loud noises over a period of time. It's cumulative. Worst of them are the mechanics. None of them protect their hearing, and it shows. One mechanic in particular started with us in his mid 30's with consistent results of almost 0 loss. He always wore headset muffs. About 5 years later his family bought him some earbuds. He uses those earbuds under his earmuffs. At roughly 10 years since using them, He's greater then 50% loss over the entire spectrum. He's always asking you to repeat yourself when asking him a question. Again, it's cumulative.
Me, loud in my home is over 65db. Which is not to say once in a while I've been known to hit 75db or a little more. But not for prolonged periods.
Garry~

