That video is useful, explaining how different tones can be deception for position and direction of travel.
I’ll try the stethoscope option and get extra witnesses as listeners. I am rather poorly at the moment so midnight escapades aren’t a good idea, but as soon as poss . . . . . . Thank you
Thank you everyone for your attention, suggestions and effort.
The thing is I am very low on technical equipment - no television, aerial or satellite dish; no mobile; only one clock radio; no hi-fi; no microwave; no smart meter; cameras always off and never on charge overnight; computer...
The signal can be heard here:-
www.vitalitywinners.com/alarm480.mov
It’s not a smoke alarm, nor a digital watch nearby, nor anything from another radio, nor an alarm coming through the wall from next door, nor a smart meter having a tantrum, nor an echo bouncing around.
I even brought in a...
Hello,
When I tell this story, I usually get brushed aside for being senile but people who know about physics might be more useful.
About a week ago I was woken up with an alarm from my clock-radio. That was odd as I had never used the alarm function. Unable to find the cause, I assumed the...