3 ms·
Can I compute the mass of a coin based on the sound of its fall?
- sova 6y agoVery cool! Also: might not absolute amplitude (volume) give away a lot of mass information relative to a control mass? "The bigger they are, the louder they fall" kinda deal?
- cochne 6y agoDidn't they account for that? "Since the energy of a coin, if it's falling from a fixed height, is proportional to its mass, I would expect the sound energy to be proportional to its mass as well. So, this is what I did. I integrated the power spectral densities and fit them to a linear relationship with respect to the mass. I obtained:"
- odomojuli 6y agoOne of the replies briefly mentions coffee cup vibrations. There's a fun Numberphile episode just about this topic. https://www.youtube.com/watch?v=MfzNJE4CK_s https://www.youtube.com/watch?v=MfzNJE4CK_s By far, it is my favorite trick for impressing dining company.
- vladsanchez 6y agoWhat's the application? What is it good for?