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Sound is traveling in a medium and strikes a boundary with normal incidence.  If 63% of the wave’s intensity is reflected back towards the transducer, what percentage is transmitted?  _____ % (only type in the number, do not spell it out) [BLANK-1]

A sound wave is created by a transducer, reflects off an object, and returns to the transducer.  The go return time is 26 µs.  What is the total distance that the pulse traveled?

Which of the following crystals will produce sound with the lowest frequency? 

Which of the following formulas determines the impedance of a medium?

A pulsed wave transducer has a resonant frequency of 5 Mhz.  The lowest frequency in the pulse is 2 Mhz and the highest is 8 Mhz. What is the bandwidth?

The maximum imaging depth during an ultrasound exam is 10 cm.  The sonographer adjusts the imaging depth to 20 cm. What happens to PRF?

The thickness of the active element is ____ of the wavelength of sound in the active element. 

Cleaning a transducer should be performed:

_________________ is the dominant factor contributing to attenuation of ultrasound in soft tissue.

The matching layer