Electronic Disease.
The facts:
- Once when I turned off my computer, there was
still a certain sound around my living room
- hardly to guess from where, as it turned louder/softer
in any angle of my room(s)
- nearly ultra-sonic, my cat prooved me, that it
still persisted.
Diagnosis:
Circumstances:
- my frigo is in bad condition, switched it off.
- I know, that my notebook can disturb Radio/TV
transmissions, especially when I open a window with mixed colours/patterns.
- I switched it off, the sound remained.
- I knew, that an untight water-pipe (which I have)
may cause unsolicited phonetic signals, after turning it all off, both
warm & cold water, the ultra-sound still remained.
Fears:
- I had the impression of too high blood pressure,
which I suffered from some years ago. this also may cause "songs in
your ear". It wasn't that.
- As this unsolicited noice was best to hear around
my loudspeaker boxes, I disconnected them. the noice still persisted.
- I even considered to port all my Audio equipment
to the service point. (TV was not in question, as it is down since weeks,
ready to be transported to scrap).
- I fell into panic. I still suspicioned one of
my computers to be the reason, even after disconnecting them from wall-power.
- More panic. I searched for as many diskettes
available, in order first to backup my computers, before they might burn.
- I set my notebook out of the door, as I wanted
to leave for weekend anyhow. the noise persisted.
- Finally I considered switching off all waters,
all electricity, just not to give any aggregate a reason for malfunctioning.
- When I did so (it was already dark in my room),
I realized:
Solution:
It was my shirt. which I hung over my home-trainer
bicycle. which I didn't use for 3 years or more, which has a high-sophisticated
built-in board-computer, to measure speed, distance, pulse, etc.The batteries
of which ran out ...
Conclusion:
You should use your home-trainer on a regular
basis.