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Huygen’s principle is used to describe

Which letter corresponds to the casing of the transducer in the following image?

The type of transducer that combines the technology of linear sequence and phased array to produce a trapezoidal shaped image is called 

An increase in reflection amplitude from reflectors that lie behind a weakly attenuating structure is called

The piezoelectric effect is the 

The type of reverberation echo that usually results from a small gas bubble and appears as a high-amplitude echo occurring at regular intervals is called a

Rayleigh scattering occurs if the particle dimensions are 

The resistance to flow offered by a fluid in motion is called

Increasing the frequency of an ultrasonic longitudinal wave will result in which of the following changes in the velocity of the wave? 

To proceed from a measurement of Doppler shift frequency to a calculation of flow speed, _______________ must be known or assumed.