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Chardok
on Aug 10, 2017
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US diplomats mysteriously go deaf, Cuba suspected ...
I did not know that! It looks like anything greater than 120dB could be entirely inaudible and can lead to hearing loss.
https://en.wikipedia.org/wiki/Ultrasound#Safety
jsjohnst
on Aug 10, 2017
[–]
You are misquoting the article linked, greater than 120db is definitely audible depending on the frequency and the listener. Even at the frequencies they mention (25k being the highest), those are still audible to many humans (myself included).
AstralStorm
on Aug 10, 2017
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Even when not audible this high air pressure would be painful.
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https://en.wikipedia.org/wiki/Ultrasound#Safety