Titlebook: Acoustical Imaging; A. J. Berkhout,J. Ridder,L. F. Wal Book 1985 Plenum Press, New York 1985 Phase.acoustics.experiment.ultrasonic imaging

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aphasia

带伤害

Auf der Suche nach neuer Sicherheituter program that includes diffraction in the simulation of acoustic pulse propagation in complex 3D media (Sandvin, Pedersen, Gjøystdal, 1984). The programs are based on a generalized Kirchhoff approximation of the diffraction integral for inhomogeneous media. The approximation utilizes a dynamic r

tympanometry

Zur Ökonomie der Inneren Sicherheit. Ample attention is paid to the experimental setup, model sizing and model materials. Spectral analysis and modeling together with ray-tracing modeling prove to be invaluable interpretation tools. Examples are presented for two seam layer models and a wedge model.

人充满活力

colony

隼鹰

规范就好

Marc Buggeln,Sebastian Lotto-Kuscheasured resonant frequencies (fundamental and overtones). The shifts in the resonant frequencies of the structure (e. g., a rod) due to a material inhomogeneity (computed relative to the frequencies of the homogeneous state) are shown to bear a simple relation to the coefficients in a Fourier expansi

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