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szolo

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Residential Help ID Ultrasound Frequencies

I log spectrum analysis, fft, and rta that has these weird ultrasound frequencies regardless of microphone type of recording medium. I also have been trackin really high EMF levels. Please help me figure it out
 

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Boombox

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I did a quick Google search on VLF RFI and there apparently is some RFI down there. No idea what could be causing your problem. Does it go off when you switch the power off to your computer, TV, Wifi routers, etc., or switch off the power to your house?
 

szolo

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Thank you so much for the reply. I have recorded very similiar spectrums on laptops, Ios, and abndroid. The post is actually as i'm sitting out back on our porch. Forgive me but what is VLF RFI? It looked like ultrasound to me being a rookie.

I've done my best recording in a shielded room with mylar and nothing else on.


I use a different application to try to see if there is any infrasound issues - here are a couple screen caps. Not sure if you see any red flags here? Thanks

Here are some additional ultrasound (?) common frequencies

I log spectrum analysis, fft, and rta that has these weird ultrasound frequencies regardless of microphone type of recording medium. I also have been trackin really high EMF levels. Please help me figure it out
I could'nt add these but i shared them on my drive

https://goo.gl/photos/6sxdF3AGPUYm2Ggp7
 

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Boombox

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VLF is "very low frequency" radio waves. RFI is "radio frequency interference". VLF is anything on the radio below 100 kHz -- although technically what is received below 30 kHz is ELF (Extra Low Frequency radio waves).

Are you using a radio, or a microphone? I'm not that up on new technology. I was under the impression you were using some sort of radio receiver. Now that I've re-read your posts it looks like it is an audio microphone.

If you're recording AUDIO, there are a lot of things that could put out low frequencies: distant rumble of trains, trucks, factory noises, etc.
 

AlphaFive

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EMF

If you're recording AUDIO, there are a lot of things that could put out low frequencies: distant rumble of trains, trucks, factory noises, etc.[/QUOTE]

Spiritual Entities perhaps....... kidding people, just kidding..
 

szolo

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