Sound Beams Flashcards
True or False: Narrow beams created better images
True
The location where the beam reaches its smallest diameter is called?
focus or focal point
The near zone length is also called?
focal depth
What is the near zone of the beam?
the area from the transducer to the focus
The near zone is also called?
Fresnel zone
What is the far zone of the beam?
the region after the focal poin
The far zone is also called?
Fraunhofer zone
The sound beam converges in which zone?
Near zone
The sound beam diverges in which zone?
Far zone
At the end of the near zone, the beam diameter is equal to?
1/2 the transducer diameter
At 2 NZL the beam diameter is equal to?
the beam diameter
The NZL is determined by?
transducer diameter and frequency
Focal depth is ____ related to transducer diameter
directly
Focal depth is ____ related to frequency
directly
Sound beam divergence is determined by?
transducer diameter and frequency
Sound beam divergence and transducer diameter have a _____ relationship
inverse
Sound beam divergence and frequency have a _____ relationship
inverse
Huygen’s principle
Hourglass shape of the beam is caused by constructive and destructive interference
