ultrasound physics

7. the principle of converting energy by applying pressure to a crystal
9. logarithmic power ratio
10. a unit of pressure in the meter-kilogram-second system equivalent to one newton per square meter.
11. transmission of motion, light, sound, etc. in a particular direction or through a medium.
13. the ability of a solid object to return to its original shape after distortion by a force
14. mass per unit volume. It is an intensive property:ρ = m/V
16. a sound or series of sounds caused by the reflection of sound waves from a surface back to the listener.

1. affected by both the frequency and the propagation velocity
2. sound or other vibrations having an ultrasonic frequency
3. units of distance divided by time
4. how many cycles of compression and rarefaction occur per second
5. It increases or decreases the strength of the returning ultrasound signals
6. a measure of how "big" or "strong"
8. measure of how much the volume of the material changes for a given distorting force
12. generated by a transducer and sent into the patient
15. hand-held part of the ultrasound machine sends sound waves into your body, collects the ones that bounce back and sends them to a computer