Frequency Flashcards
1
Q
Frequency
A
of wave cycle in a second
2
Q
Frequency units
A
Hz
3
Q
Infrasound
A
<20hz
4
Q
Audible
A
20hz to 20000 hz
5
Q
Ultrasound
A
> 20000hz
6
Q
Imaging frequency
A
2 MHz to 10 MHz
7
Q
Frequency determined by
A
Source
8
Q
Frequency affects the depth of penetration
A
Increase frequency
Decrease depth
9
Q
Frequency improves axial resolution by
A
Decreasing wavelength, spl length, period and pulse duration
10
Q
Increasing Frequency improves lateral resolution by
A
Extending the near zone, decreasing be diameter and angle divergence
