Alex Reinhart – Updated February 17, 2017 notebooks · refsmmat.com

Back in high school, as part of a summer science program, I ran an experiment to determine if you really can tell how ripe a watermelon is by thumping it. I only got to thump and taste-test eight melons, so I don’t have great data, but as I recall, damping and natural frequency were predictive—high damping suggested an overripe, mushy melon.

There is, naturally, peer-reviewed literature on this.