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Blue duck that's exactly what I see, if it was tinnitus in a silent room with no external input why would it read that? I suspected tinnitus until I used the sound meter, just sparked my curiosity and thought it best an informed crowd.

Coincidently as it may seem I stumbled across a document suggesting it could be linked to voice to skull technology as it requires the same attributes of 22 db and 70 frequency, but that makes me feel sillier even more. So hey guys strange introduction and all, I can't figure this one out.

It sounds exactly the same though. Maybe it's just coincidence but to relate it sounds like the drone from a television set like a dog whistle type blow but constantly. It's very odd and I feel silly for not being able to figure it out. There is a power plant local to us so I'm just going to...

All parts of the house now checked, went out walking only to discover the same sound there also and it was more or less silent due to its remoteness. Got out the sound meter and spectrograph and got the same results. Would it seem it could be our local version of the hum? Again it was around 22...

It's a constant noise and I have also blead the radiators. From research I could suggest electronic harassment?

Rob it is to no avail good sir, after trying the water mains from under the sink and cleaning up a puddle of water (how did you know).

Nice spelling ;), OK alarm checked, boiler checked, under sink checked, looking for water mains. I feel like I am playing a game, called how to involuntary learn how to fix any problem in a house. xxc

I understand the hum would link to tinnitus or potentialy the atomic clock and the constant GPS signal sent around the earth that operates on a very specific frequency. My only concern is that this noise is very real as the sound equipment picks it up, so I found comfort in the fact that I am...

Yeah I have tried switching off all the mains and even gone so far as to take the battery out of the alarm, and checking the central heating but still to no avail. I'm running out of ideas in all honesty, and don't want to be that loon going around to every neighbours house asking them to turn...

Hello thank you for correcting me, so I hear this dog whistle like sound when I am in the house I live in. I have got a spectrograph and a sound meter an the spectrograph it shows the sound at 70hz and on the sound meter it shows it at 22decibel 

Complete noobie here looking for an electronic device. Please could someone assist me in understanding what could omit a sound frequency between 22 decibels and 23, I have used a sound analyser due to thinking it was tinnitus. How ever the sound analyser shows up a distinctive frequency of 22...