P1 - topic 4 - ultrasound and infrasound Flashcards
1
Q
what happens to ultrasound waves at a boundary between media?
A
partially reflected
2
Q
what is partial reflection?
A
when some of the wave is reflected off the boundary between the two media, and some is transmitted
3
Q
what is ultrasound?
A
a sound with a frequency higher than 20 000 Hz
