Originally Posted by noah katz
Right, Wilson's "science" is meaningless w/o dimensions of the samples used.
WRONG!!! The term "rigidity" is what is confusing you. The real term that should have
been used by Wilson is Young's Modulus - which is the ratio of stress to strain in the
elastic deformation part of a material's stress strain curve [ prior to the onset of plastic
deformation at the yield point].
THAT is the quantity that is related to resonances. [ I can forgive Wilson for using the
term "rigidity" because most people don't know what Young's Modulus means ].
Young's Modulus is INDEPENDENT of the dimensions. So Wilson is correct here.
One of my professors in material science also had perfect pitch. He also had memorized
the relationship between Young's Modulus and frequency. You could hand him a piece of
metal which he would rap on the table or whatever, listen to the ring; and then give you a
pretty good estimate of the value for Young's Modulus. They actually make laboratory
equipment that can do what my professor did with just his brain and ears:http://www.itma.es/ing/02/equipamien...nometal58.html