BEAM BASICS
5 terms
How many terms are used to describe a sound beam?
Fresnal Zone
What is another name for the near zone?
Fraunhofer Zone
What is another name for the far zone?
Intensity
What describes how power is distributed within the beam?
Lateral resolution
Focusing improves which type of resolution?
Near zone or Fresnal Zone
What zone is the regions that is closest to the transducer?
What increases when you increase the transducer diameter?
divergence
In the far zone, a higher frequency causes the beam to decrease in...
The center of the sound beam
Where is the highest intensity found in a sound beam?
Mechanical
What type of focusing is used in curved elements?
Far zone or Fraunhofer zone
What zone is the region where the sound beam diverges?
Near Zone Length
When the frequency increases, what also increases?
Frequency
Beam divergence is inversely related to what?
attenuation & divergence
Intensity increases due to which two factors?
electronic
Which type of focusing emits timing delays?
Frequency & Diameter
What determines the length of the near field?
The end of the near zone
Where is the focus located in regards to the near zone?
Where does the far zone begin?
directly proportional
How are intensity and amplitude related?
the focus increases
When you decrease beam width, what happens to the focus?
Increase frequency
What can you do to cause the neaar field length to increase?
Element Diameter 2
Near zone length is directly proportional to what?
wavelength
Divergence in the far zone is directly proportional to ....?
focal zone
The location where the intensity is the highest is also called?
intensity decreases
As sound travels deeper into the body, what happens to the intensity?