Dave Plowman (News) wrote:

In article ,
Chris J Dixon wrote:
I tried one, and the cats and squirrels were completely
unaffected. However, my partner's rather younger ears were
sufficiently sensitive to find it seriously irritating, so it
didn't stay in use very long.

Not really ultrasonic if you can hear it?

Sub-harmonics?

Chris
--
Chris J Dixon Nottingham UK


Plant amazing Acers.