"Bob La Londe" fired this volley in
:

Hmmmm... I'm not sure any of that makes a point, but its some nice
anecdotal information to consider. LOL.

Bob,
I used not to be comfortable in a room with a TV which had a loose
bracket on the flyback transformer. The 17.5KHz deflection frequency
literally drove me out of the room!

At 64, I can't hear much above 10KHz, and suspect that's diminishing due
to my fireworks and explosives activities (and Viet Nam, where I had an
eardrum perforated by a nearby and unexpected firing of a Browning .50).

Lloyd