On Feb 3, 8:37*am, Dave wrote:
[snipped for brevity]
After all, we're woodworkers who have been hammering nails all our
lives and putting up with the screaming of cheap dust collectors.
(until we bought our Festool dust collectors). So, most of us have
lost our fine edge of hearing a long time ago.

Our hearing goes for a crap with age, regardless. That hearing loss
can/will be accelerated when exposed to damaging sound sources of high
level, pitchm duration, etc. A jack-hammer, for instance, won't cause
as much damage as a bitching woman.