Mod 1 Unit 2 (Basic Principles) Flashcards
1
Q
2 reasons we study sound waves
A
bio effects and good imaging
2
Q
What is sound?
A
energy that moves as a wave, NON IONIZING
3
Q
Sound changes…
A
pressure, temperature, particle motion, density
4
Q
Region of high or max acoustic pressure corresponds to a
A
compression
5
Q
Region of low or
minimum acoustic
pressure corresponds to a
A
rarefaction
6
Q
Ultrasound range
A
Any sound over 20,000 Hz or over 20 KHz
7
Q
Frequency
A
cycles per second
8
Q
Period=
A
1/f
9
Q
What is wavelength?
A
physical distance from
one compression to the next compression
10
Q
Wavelength=
A
c/f=propagation speed/frequency
11
Q
Propagation velocity (c) depends on
A
physical properties of medium
