Uogólniony opis średniego ciśnienia akustycznego w quasiliniowym przybliżeniu parabolicznycznym

• Autorzy: Zachariasz K.

Warianty tytułu

EN

Generalized description for averaged acoustic pressure using quasilinear parabolic approximation

• Konferencja: 17 th Symposium on Hydroacoustics (23-26.05.2000; Jurata; Polska)
• Języki publikacji: PL

Abstrakty

EN

Harmonic generation in the nearfield of the harmonically excited cireular piston souree is considered. The quasilinear parabolic model is used to determine the averaged pressure over the planar receiving transducer of a diameter equal to that of the souree. The model is then simplified by assumption that the receiving transducer covers the entire section of the aeoustie beam. The derived general expressions are used in sample computations of the second and third harmonie eomponents of the averaged pressure in distilled water. The resuLts ofcomputations are eompared with the results obtained from direct numerical integration (so ealled Bergen eode) of the KZK equation and with the experiment conducted in distilled water.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2000
• Tom: Vol. 3
• Strony: 63--68
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Zachariasz K.

• Department of Acoustics, Technical University of Gdańsk, ul. G.Narutowicza 11/12, 80-952 Gdańsk, Poland

Bibliografia

• 1. C. Baker, B. Ward, and V. F. Humphrey, The effect of receiver size on nonlinear pressure field measurement, J. Acoust. Soc. Am. 100, pp. 2062-2069, 1996.
• 2. S. Saito, Measurement of the acoustic nonlinearity parameter in liquid media using focused ultrasound, 1. Acoust. Soc. Am. 93,162-172,1993.
• 3. K. Zachariasz, The use of back profection reconstruction of actual source characteristics for a radiating transducer in nonlinear pressure field modelling, Proceedings of the Fourth European Conference on Underwater Acoustics, Rome, Vol. II, pp.951-956, 1998.
• 4. K. Zachariasz, The acoustic system for measurement of the nonlinearity parameter B/A of the water medium using parabolic model, Ph. D. dissertation, Technical University of Gdańsk, (1997) (in Polish).
• 5. J. Berntsen and E. Vefring, Numerical computation of a finite amplitude sound beam, Rep. No. 81, Department of Mathematics, University ot Bergen, Bergen, Norway,1986.
• 6. V.E. Kunitsyn and O.V. Rudenko, Second harmonie generation in the field ot a piston radiator, Sov, Phys. Acoust., 24, 310-313, 1978.
• 7. S. Leble and K. Zachariasz, Multiple frequencies contributions of nearfield sound diffraction from uniformly excited piston, Proceedings of the XlIlth Symposium on Hydroacoustics, Gdynia-Jurata 7-10.05.1996, Gdynia, pp.165-172, 1996.
• 8. G. Du and E. Wang, Generation of harmonics in a focusedGaussian sound field, J. Acoust. Soc. Am. 97,1486-1488,1995.