Could anyone care to explain to me why there is a steady 409

>>8304652
>every electronic device has been turned off
then how did you measure the spectrum?
What did you use to measure? Is this sound or radiation or what?
It's clearly not resonating, w/e it is. It's a very small signal, probably noise from the internal components of w/e you used to measure.

you can calculate what types of standing waves you can get by measuring the lengths of your room. This is primarily used in acoustics, but is also equally applicable to EM radiation.

If every device is off then how did you take that spectrum?

Its a sound. It has been bothering me for about an hour now. I used my phone to analyze the spectrum. Its not coming from that.

And to clarify. It is quite loud.

>>8304680
You probably have a tumor, your phone is making that frequency, go see a doctor.

>>8304697
I can hear the sound rise along with the visuals on the analyzer. Its not in my head, its not from any electronic device inside my room. I checked multiple times.

>>8304721
one time i smoked a bunch of hash and ate at a chik fil a before i stumbled back to my apartment.

As I laid there, waiting for the high to wear off, I heard a series of tones centered on a middle A the second to last tone was out of key.

This repeated for about 2 hours and drove me fucking crazy.

TL:DR you might be on drugs

>>8304745
lmao
I'm not on drugs, I don't have a tumor and I'm not crazy.

>>8304768
it's probably coming from periodic motion of some sort

a fan blade, from a computer,an AC unit, a ceiling unit, the fridge. something like that.

File: Tr02vTw.gif (745KB, 640x360px) Image search: [Google]

745KB, 640x360px

>>8304768
are you sure?

It could be anything really. If it's a single source, then whatever it is, it seems to be generating harmonics.

Which app did you use. I wanna check out my apartament for paranormal shit

>>8304652

It isn't an electronic noise. Synchronous motors would be at some 60 hz interval (1/3x, 1/2x, x,2x,3x, etc). Asynchronous would have some slip. I would say it is just a harmonic frequency which could be from anything. Do you have anything mechanical nearby that might be resonating whatever is causing it?

>>8304652
It's a ghost

>>8304652
Government mind control.
Read Candor

>be OP
>live at home with parents
>hear strange noise
>shut off all electronics
>search house for origin of said noise
>parents bedroom
>dammit mom left her vibrator on again

>>8304652
In addition to 50 or 60 Hz mains it is well known that some circuits use 400 Hz AC. The advantage, which real scientists should have known, is that coils and transformers can be made much more compact.

You see another spike at twice the frequency, so we are talking about some harmonics.

I suggests you look for some kind of rotating machinery, an auxiliary power unit or something in a ventilation system.