| Autor: |
Kourtiche, Djilali, Alliès, Laurent, Nadi, Mustapha, Chitnalah, Ahmed |
| Předmět: |
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| Zdroj: |
International Journal of Acoustics & Vibration; Dec2008, Vol. 13 Issue 4, p151-156, 6p |
| Abstrakt: |
This paper presents an analytical formulation for correcting the diffraction associated with the second harmonic of an acoustic wave, that is more compact than that usually used. This new formulation resulting from an approximation of the correction applied to the fundamentals, which makes it possible to obtain simple solutions for the average second harmonic acoustic pressure but is sufficiently precise when measuring the parameter of nonlinearity B/A in the finite amplitude method. Comparisons with other expressions requiring numerical integration show that the solutions are precise in the near field. Furthermore, the effect of diffraction in the B/A parameter measurement system is discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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