Title :
Measurement of acoustic nonlinear parameter of solids by standing wave method
Author :
Wu, W.Q. ; Han, Feifei
Author_Institution :
Lab. of Modern Acoust., Nanjing Univ.
fDate :
31 Oct-3 Nov 1993
Abstract :
Acoustic nonlinear parameter β is a new characterization parameter of material. Up to now, β is usually determined by measuring second harmonic amplitude using burst technique in progressive wave field. For thin samples, this method is not convenient. The solution of second harmonic, sum frequency and different frequency signals generated by nonlinearity in standing wave field for materials with and without loss are studied and the expression for calculating β is obtained. Finally, the method of measuring β in standing wave field is suggested
Keywords :
acoustic variables measurement; harmonics; nonlinear acoustics; acoustic nonlinear parameter; different frequency signals; progressive wave field; second harmonic amplitude; standing wave method; sum frequency; Acoustic materials; Acoustic measurements; Acoustic transducers; Acoustic waves; Boundary conditions; Crystalline materials; Frequency; Impedance; Nonlinear acoustics; Solids;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339510
