V2 µ r. Longitudinal waves are produced in a certain rod of density. Wave velocity ms Wavelength m Frequency Hz Example calculation Lets take for instance the case of a wave with a frequency of 56 Hz going through a material at a speed of 168 ms.
A2 l 2µ r.
L is he first Lame parameter. V is the wave speed in metres per second ms. V l f 450 n m 45 H z 20 250 n m s. Formula to calculate wave period from wave length l and speed.