Re: hearing a high pitch frequency 24/7?
Its more than likely, in fact I can guarantee you, that it is a cat deterrent.
These sonic boxes emit a very high frequency which is inaudible to humans....except.....they are audible.
I've heard them countless times, in fact I e-mailed the manafacturer of these devices complaining that I could hear them and was told "must be faulty if you can hear it".
Anyway, one way or another, you can hear these devices.
Check the local neighbourhood for little green boxes mounted in peoples gardens and there you will find your answer. Then tell the neighbour to either a) fix the ******* box, or b) turn the ****** off, because it is doing your head in.
If it isn't an ultrasonic cat deterrent, then like the other guy said, it could be tinnitus. In that case a trip to the doctors is in order.
And a trip to the shrink is in order if you think it is a wave of conciousness, haarp, a deliberate government experiment to turn you mental, or ascension.
Seriously, check your neighbourhood for green devices, if you rule that out then get your hearing checked.
I hope this helps.
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