Speakers - High frequnecy

[Dantheman]

Hey,

What do you guys think? What kind of speaker could it be?

Nearly every day me and my neighbor tend to leave for work at roughly the same time. He tends to stay behind my car and is not close, however I have been starting to feel high frequencies coming from his car?? I cannot hear it but feel it. It only started after some minor fence dispute.

Does anyone know what it could be?

 

[Tim Link]

Google Play store has an Ultrasound detector app. If you can record the sound you might be able to zoom in on the source. Ultra high frequency sound tends to be highly directional and relatively easy to block or absorb.

 

[Dantheman]

Thanks I did that today and it definitely picked up something, what do you think they are possibly using?

 

[Tim Link]

The only things I know of are ultrasonic cleaning machines and pest repellent devices.

 

[Gregadd]

Ahem. These days there is not nearly as much shame attached to mental illness. Auditory hallucinations can be a symptom of. a serious problem. Seek immedote help from a mental health professional.

OTOH. Stalking is illegal in most places. And while it is inaudible. I am sure it can be electronically detected.