+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
What does Period mean?
|
The time required to complete a single cycle.* Period can also be descried as the time from the start of a cycle to the start of the next cycle.
|
|
What are the units of Period?
|
Seconds, msec, hours { any unit of time}
|
|
What is Period determined by and can it be changed by the sonographer?
|
It is determined by the sound source and it can not be changed by the sound source.
|
|
What does Frequency mean?
|
The number of certain events that occur in a particular time duration.* In ultrasound the frequency of a wave is the number of cycles of an acoustic variable that occur in one second.
|
|
What are the units for Frequency?
|
Per second, 1/second, Hertz, Hz*Hertz is another way of saying "per second"
|
|
What is Frequency determined by and can it be changed by the sonographer?
|
It is determined by the sound source and it cannot be changed by the sonographer.
|
|
How does sound create images?
|
It creates images by sending short bursts into the body.
|
|
Acoustic Propagation Properties are?
|
The effects of the medium upon the sound wave.
|
|
Biologic Effects are?
|
The effects of the sound wave upon the biologic tissues.
|
|
What type of wave is Sound?
|
A type of wave that carries energy, not matter, from place to place.
|
|
How is Sound created?
|
Created by the vibration of a moving object.
|
|
What is Sound comprised of?
|
Its comprised of compressions { increases in pressure or density} and rarefactions { decreases in pressure or density}
|
|
What does Sound travel through?
|
Sound must travel through a medium, cannot travel through a vacuum.
|
|
What type of wave is Sound?
|
Sound is a mechanical, longitudinal wave.
|
|
How does Sound travel?
|
Sound travels in a straight line.
|
