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Marcos Ortega's picture
capturing sound

Is there a way or has anyone ever heard of research that involved capturing the sound that a person hears? Like somehow attaching sensors to someone's ear drums and filtering out the low frequencies.
Just curious to know if it's possible. Reason being is that whenever my friend hears this distinct high pitch sound, he stops whatever it is he's doing and asks us "did you hear that?" And I don't know if it's just coincidence, but every time it happens an earthquake occurs the very next day. It's weird!
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