How to compute phase velocity and wavelength of signal

Dear all,

I have a matrix which contain 3 columns: time and amplitude of 2 acceleration. These value is get from acceleration when hitting into the ground. I need to compute phase velocity and wavelength from them. BUt i do not have any idea to get it. I had seached from internet, someone say that using FFT is ok, however, from fft I just know how to get phase angle, and I stuck in there. My way is wrong, isn't it?

Could you please to help me to compute it.

Thank you very much.

Answer 1

[AHMED ASEEM]

Hi ngotha,

I guess you might have to use this formulae. I am also looking for phase velocity of signal. I hope you've found your answer by now;

Cp = -w(delat d)/[(phase angle 1(w) - phase angle 2(w)]

delta d = distance between two points along the signal direction on which phase angle is measured

w = angular frequency

Cp= phase velocity

How was you manage to get phase angle ?