Measurement of the longitudinal and transverse vibration frequencies of a rod by speckle interferometry. Bayon, A, Gascon, F, & Varade, A Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on, 40(3):265–269, 1993.
Measurement of the longitudinal and transverse vibration frequencies of a rod by speckle interferometry [link]Paper  abstract   bibtex   
A heterodyne interferometric system was used to detect the normal and tangential components of the displacement at one point of a sample when it is vibrating freely in its natural modes, arising from transient excitation. A cylindrical aluminium rod was the test sample. An analysis of the spectrum associated with the in-plane and out-of-plane displacements made it possible to determine the values of the longitudinal and transverse natural frequencies ER -
@article{Bayon1993,
abstract = {A heterodyne interferometric system was used to detect the normal and tangential components of the displacement at one point of a sample when it is vibrating freely in its natural modes, arising from transient excitation. A cylindrical aluminium rod was the test sample. An analysis of the spectrum associated with the in-plane and out-of-plane displacements made it possible to determine the values of the longitudinal and transverse natural frequencies ER  -},
author = {Bayon, A and Gascon, F and Varade, A},
issn = {0885-3010},
journal = {Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on},
keywords = {Published,aluminium,cylindrical Al rod,displacement measurement,heterodyne interferometric system,in-plane displacement,light interferometry,longitudinal vibration frequencies,out-of-plane displacements,speckle,speckle interferometry,transient excitation,transverse vibration frequencies,vibration measurement},
mendeley-tags = {Published},
number = {3},
pages = {265--269},
title = {{Measurement of the longitudinal and transverse vibration frequencies of a rod by speckle interferometry}},
url = {10.1109/58.216840{\%}5Cnpapers://3505bcc3-5652-4fb7-84d6-96498ebafa9c/Paper/p238},
volume = {40},
year = {1993}
}

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