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First sorry if this question if it's out of topic but I'm very intrigued

The human ear can hear a specific range of sound waves frequency. and huge amplitude of those sounds can damage the ears

but the ultrasound waves that the ear could not hear, if their amplitude exceeds 100dB for example, my question is :

  • couldn't that be a huge danger too to the ear?
  • if so, since we can't hear the sound, how can we react to that danger !!!!
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closed as too broad by Stanley Pawlukiewicz, lennon310, Marcus Müller, A_A, Peter K. Jan 17 at 12:50

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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Not sure if it's the proper forum, but there some research done on the subject

http://www.hse.gov.uk/research/crr_pdf/2001/crr01343.pdf

Basically, there are limits even in ultrasound, but they are higher than 20Hz-20khz sounds

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    $\begingroup$ there are also issues regarding ultrasound and the human fetus. some question if the benefit gained from the image is worth blasting a pre-born baby with high-intensity acoustic energy. kids have better hearing than we old farts. just because a blast of ultrasound isn't noticed by me doesn't mean it ain't noticed by a 32-week-old fetus. $\endgroup$ – robert bristow-johnson Jan 16 at 19:56
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    $\begingroup$ Medical ultrasound is north of 1 MHz. That ought to be safely out of the "unknown" hearing range of a fetus. $\endgroup$ – Hilmar Jan 17 at 18:02

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