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RipThrotes t1_iu8y1se wrote

Theoretically, you could put a really small microphone deep in your ear and amplify the sound for others to hear. There's actually a noise there, it's not like tinnitus/hearing loss where there's a ringing. That noise is made by your brain and cannot be heard by others.

But, no, if you stood ear to ear with a buddy they won't hear your blood flowing.

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