Here are some papers…
Notes on Mechanical Shock & Bending Waves
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Functions for calculating wave speeds are given in:
Matlab script: Vibrationdata Signal Analysis Package
The functions can be accessed via
>> vibrationdata > Miscellaneous > Acoustics & Vibroacoustics > Structural Wave Speeds
and
>> vibrationdata > Miscellaneous > Acoustics & Vibroacoustics > Acoustics > Speed of Sound
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Wave Propagation Videos
Group Speed less than Phase Speed
Group Speed equal to Phase Speed
Group Speed greater than Phase Speed
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– Tom Irvine
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