On 8/02/2015 5:54 AM, Randy wrote:
On 2/7/2015 12:00 PM, amps-request@contesting.com wrote:
Message: 3
When I was a kid, a local department store had some kind of
ultrasonic alarm system that drove me nuts. I used to also be able to
hear the 15 kHz sound from TV sweep oscillators. One of the
advantages of growing up is not hearing these any more ! 73, Steve, N2IC
For whatever reason, people that has asthma as children have enhanced
ability to hear "ultrasonic" sounds.
I didn't have it, but even at 55 years of age, I can still hear CRT
sweep oscillators.
Yeah. I remember that sound.
Sounds a lot like the wife does, these days.
Alek
VK6APK
--
From sunny Binningup, Western Australia.
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