Recent content by mikelotinga

Thankyou for your reply. I think that yes, the geometry is the reason. And solutions to the wave equation in 3-dimensions show that the velocity solution includes an r^(-2) factor whereas the pressure solution contains only r^(-1) factors (see Bies and Hansen, 2009 "Engineering Noise Control"...

Hi there. I've been looking around for a decent physical explanation of the differences in the phase relationships between acoustic pressure and particle velocity in different types of waves. Mathematical analyses abound, e.g...

Ah, got it, contrary to the bottom part of my original post, this last one IS the equation for the phase speed of a quasi-longitudinal wave in a bar. Sorry to waste your time, puzzle solved!

Hi Tim, Thanks for the welcome and for pointing out that, by the definitions of ##c_P## and ##c_L## in my post, in fact, $$c_P = c_L$$ so there IS no mathematical distinction. I can see what happened. In the Remington text I mentioned, they use the definition $$c_L =...

Hello, this is my first post on this forum so nice to be here, and I'll be very appreciative of any responses. My background is in acoustics, and hence my question is relevant to vibration propagation. The terms 'compression' and 'longitudinal' are both frequently used to describe the same...