Ultrasound Flashcards
1
Q
What is the range of human hearing?
A
20Hz to 20,000Hz
2
Q
What can be used to produce ultrasound waves?
A
Electronic systems
3
Q
What do ultrasound waves have a frequency higher than?
A
The upper limit of hearing for humans
4
Q
When are ultrasound waves partially reflected?
A
When they meet a boundary between two different media
5
Q
What can the time taken for the reflections to reach a detector be used to determine?
A
How far away the boundary is
6
Q
What is distance measured in?
A
m
7
Q
What is speed measured in?
A
m/s
8
Q
What is time measured in?
A
s
9
Q
Give two examples of ultrasound being used in medicine
A
Pre-natal scanning, removal of kidney stones
