Nonlinear effects influence to ultrasound beams spatial distribution and focusing
Abstract
In the present paper, the behavior of focused ultrasound beams, spatial distribution of intensity and pressure amplitude, intensity, and pressure maxima location shift relatively to geometrical focuses were researched. A feature of this work is that measures were made for real ultrasound transducer, which is used in diagnostics and provides double cylindrical beam focusing. For this case formulas for diffraction maxima are derived and the next fact has been experimentally revealed: a location of real intensity and pressure maxima extensively depends on nonlinear effects.
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References
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