Monday, 23 November 2015

acoustics - Does the human body have a resonant frequency? If so, how strong is it?


Inspired by this question on Music beta SE, I'm wondering if the human body has a strong resonant frequency. I guess the fact that it's largely a bag of jelly would add a lot of damping to the system, but is that enough to dampen it entirely?



What models for resonance might be used to model the human body? (E.g. weight-on-a-spring, with legs as springs?) What about individual, semi-independent body parts, like legs, or lung cavity (acoustic resonance?).



Answer



There seem to be a lot of human body mechanical models, such as this one: enter image description here


As for applications, I have heard that sub-audio frequency vibrations have been considered as nonlethal weapons for riot control.


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