Lecture 2 Flashcards
1
Q
T/F: A wave is a traveling variation in certain quantities.
A
True
2
Q
The 4 acoustic variables are:
A
- Pressure: Concentration of force.
- Density: Concentration of mass or weight.
- Particle Motion: Measurement of distance.
- Temperature: Measurement of heat.
3
Q
The number of complete cycles that occur in one second.
A
Frequency
4
Q
5 Hz is equal to:
A
5 cycles per second.
5
Q
3.5 MHz is equal to:
A
3,500,000
6
Q
An increase in frequency results in:
A
Increased (better) resolution.
Decreased (less) penetration.
7
Q
The operating frequency of an ultrasound machine is determined by the:
A
Transducer (crystal).
8
Q
The Period of an ultrasound machine is determined by the:
A
Transducer (crystal).
9
Q
The length of time it takes for one complete cycle to occur is the:
A
Period.
10
Q
Frequency formula:
A
F = 1/P
11
Q
Period formula:
A
P = 1/F
12
Q
Frequency x Period =
A
1
