I've been a bench jeweler for over 20 years now. Having used
ultrasonic cleaners every day I've recently noticed something.
I've lost some hearing in the high frequency range. These
little miracles of modern tech. definetly have their downside.
Don’t be too quick to blame the hi frequency hearing loss on the
the ultrasonic cleaning unit. Hi frequency hearing loss is a
normal part of aging. There are 2 small bones in the inner ear
(anvil & stirup, I believe) that tend to calcifey as we age. This
condition causes them to be less responsive when transfering
high frequency vibrations from the ear drum to the rest of the
Back in the 70’s there was an otolaryngologist in Iowa City IA
that preformed an operation to remove the calcification & restore
the high frequency hearing. I don’t know if that procedure ever
became widely used or not.