Goofy said:

Rapping a plastic cup to see what kind of
a sound is made, and using that result to make
universal determination on material efficacy is quite stupid.

Not if if you have a picture of an asprin and lick a dog's arse, Sick.

Complete lack of bias-controlled, level-matched, serially implemented,
statistically significant, bias-free, snot-encased, electrically grounded,
morally superior DBT result's, noted. As if someone with your credential's
or, should I say "lack of" credentails would even know how to reliably
subjectivationalize a listening test, LOt"S! ;-) LOl! ;-(