Is there any map/database of places with high frequency noise?

files.catbox.moe

Is there any map/database of places with high frequency noise?

files.catbox.moe

u/lukmly013 💾 (lemmy.sdf.org)@lemmy.sdf.org to

196@lemmy.blahaj.zoneEnglish · 9 days ago

Not the first time. This one I am surprised I could hear since it appears quite high, but also it’s mostly an awful feeling of pressure rather than just eeeeeeeeeeeeeeeeeee

Found inside a certain shopping center.

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9 days ago
That reminds me of this blogpost: https://www.windytan.com/2024/06/ultrasonic-investigations-in-shopping.html

(TL;DR: pilot tone from multi-loudspeaker PA system)

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