Which of the following determines the amount of reflection at the interface of two dissimilar materials?

A wave vibration at 20 cycles per second has a frequency of 

If the frequency of sound is above 20 kHz, what is it called? 

Which equation describes the relationship among wave propagation speed, wavelength, and frequency? 

Harmonic frequencies are derived from

Ultrasound wave propagation causes the displacement of particles in a medium.  What are the regions of lowest particle concentration called? 

The actual time from the start of the pulse to the end of the pulse is known as 

If frequency is reduced by a factor of two, the wavelength will 

When particle motion of a medium is parallel to the direction of a wave propagation, what is the wave being transmitted called?

____________ utilizes numerical and graphical methods to look for patterns in a data set, to summarize the information revealed in a data set, and to present that information in a meaningful way.