What is Reddit's opinion of Spectrum Analyzer?

If you've got an android phone then you can do a live spectrum analysis of it.

https://play.google.com/store/apps/details?id=com.raspw.SpectrumAnalyze&hl=en_AU&gl=US

and so on

or record it onto your pc and then there are many tools available.

I really just searched the Play Store for "Spectrum Analyzer" and took (I think) the first result I found. This should be a direct link to it., free too.

It's also useful for figuring out where those kinds of sounds are coming from: phone microphones are far more directional than our hearing (especially at that frequency)

Ran my a version spectrum analyzer app (https://play.google.com/store/apps/details?id=com.raspw.SpectrumAnalyze) on windows 8.1 with chrome browser and it worked great. Tried it on my work computer with windows 7 and it didn't like it. Only needed the record audio permission so I didn't need to worry about the limited google play services support.

I did have some NDK native code on there, which I was glad it worked.

Download this app, or similar.

https://play.google.com/store/apps/details?id=com.raspw.SpectrumAnalyze

Look for a spike in the higher audible frequency range. Walk around the house looking for the possible origin.

I understand your frustration. My high frequency hearing survived into my early 40s and I was able to hear CRT flyback transformer whine when others could not. If *you* can hear it an FFT app *might* be able to pick the tone out of the background even if the recording doesn't capture it.

Are the packets malformed or do they appear to be valid? Do they have anything other than the QoS data header?

I half suspect it's interference, and could be something as simple as a microwave running. Those are very common culprits, especially in the 2.4ghz range.

If you have an Android device, you may find some luck in getting a spectrum analyzer app. I just found and installed one (https://play.google.com/store/apps/details?id=com.raspw.SpectrumAnalyze) but don't know anything about it. iOS devices have apps, but I can't find any free apps offhand.

Some ad-hoc suggestion: if your radio has a monitor function (mostly have it), you may enable it and use some spectrum analyser app on your mobile to check what's coming from the PC.

Something like these:

scientist here:

look for big fans or old pipes that could produce infrasound.

this is sound too low for your ears to detect but it can fuck with physical objects and even make you see things by deforming the shape of your eyes if it happens to resonate with them, or hear things if it resonates in your ear in such a way to stimulate your cochleal neurons

there are even reported cases of ears and noses spontaneously bleeding from the effect.

appliances, especially those with big bulky fans, are usually the culprits.

use an app like this one to look for sources in that low range. literally walk around your house with your phone and see where those frequencies peak.

Vic Tandy and Tony Lawrence of the psychology department wrote a paper called Ghosts in the Machine for the journal of the Society for Psychical Research. They cited infrasound as the cause of apparitions seen by staff at a so-called haunted laboratory in Warwick.

It happened some years ago when he was designing anaesthetic machines in that "haunted" Warwick laboratory. A cleaner had already given in her notice, complaining that she had seen a grey object out of the corner of her eye and "gone all cold".

Tandy was working late one night when the grey thing came for him. "I felt the hairs rise on the back of my neck," he recalls. "It seemed to be between me and the door, so the only thing I could do was turn and face it."

It disappeared. But only to reappear in a different form the following day when Tandy, a keen fencer, was oiling his foil and changing its grip for a forthcoming tournament. "The handle was clamped in a vice on a workbench, yet the blade started vibrating like mad," he remembers.

This time it was daylight. There were other people around. Although the hairs were rising once again, he was determined to find a scientific explanation. Why did the blade vibrate in one part of room and not another? Because, as it turned out, infrasound was coming from a fairly new extractor fan.

"When we finally switched it off, it was as if a huge weight was lifted," he says. "It makes me think that one of the applications of this ongoing research could be a link between infrasound and sick-building syndrome."

sound familiar?

vibrating objects, strange sounds and sensations, general dread?

Give infrasound investigation a try. you could bust the ghost in your own house :)

You should get an audio spectrum analyzer for your phone. It helps in tracking this stuff down.

https://play.google.com/store/apps/details?id=com.raspw.SpectrumAnalyze&hl=en_US&gl=US

There you go! :D Let me know if you need anything else!

Hast du dir mal etwas zum Spektrum-Anzeigen aufs Telefon gespielt? https://play.google.com/store/apps/details?id=com.raspw.SpectrumAnalyze&hl=de

Spectrum Analyzer app from the video