Antisymmetric nature of the earliest arrivals of ultrasound propagating in copy paper

Autor:	Mont A. Johnson, Yves H. Berthelot
Rok vydání:	1997
Předmět:	Physics Acoustics and Ultrasonics business.industry Antisymmetric relation Acoustics Ultrasound Wake Laser Poisson's ratio law.invention Pulse (physics) symbols.namesake Interferometry Optics Arts and Humanities (miscellaneous) law symbols business Photoacoustic spectroscopy
Zdroj:	The Journal of the Acoustical Society of America. 101:2986-2989
ISSN:	0001-4966
DOI:	10.1121/1.419473
Popis:	Experiments with laser generation and detection of ultrasound in copy paper indicate that earliest arrivals of ultrasound are antisymmetric. A likely explanation is that the out-of-plane interferometer is relatively insensitive to the symmetric compressional pulse because of the low Poisson ratio of copy paper, but rather sensitive to its antisymmetric flexural wake associated with the random heterogeneities and gradients present in copy paper.
Databáze:	OpenAIRE
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