Physics 1 Flashcards
What is the period of a sound wave?
Time base Period is1/frequency
What is the frequency of a sound wave?
number of events that occur in a particular amount of time
Propagation Speed
1540 m/s
Describe a pulse duration
Time pulse is on in time
Describe a spatial pulse length
measured in distance. The ditance from start of end of one pulse
Describe a pulse repetition period
Units is msec the listening time
Describe the duty factor
No unit the percentage of thime that the system transmits sound
Pulse parameters what will a deep image have
High PRP low PRF and low duty factor
What pulse parameters will a shallow image have
Low PRP High PRF and High Duty factor
What is the difference between spatial and temporal amounts of power?
Spatial is the amount of power that is emitted by the beam at a specific area
Attenuation what happens as depth increases
attenuation increases
What is rayleigh
backscattering of red blood cells
What is Huygens principle?
each point on a transducer surface can be considered an individual sound source. Sound wave produced by very small sources diverge in a V are known as spherical wave or diffraction patterns or Huygens wavelets
