Acoustical Physics Crossword

Two waves are traveling in a medium and arrive at a location at the same time. What event takes place?
What is the concentration of energy in a sound beam?
How are frequency and speed related?
What describes a short burst of acoustic energy?
Pulse repetition frequency is the reciprocal of ________.
What is the most relevant intensity with respect to tissue heating?
What is the decrease in intensity, power, and amplitude as sound travels?
What is a change in direction of wave propagation when traveling from one medium to another?
What happens when a PZT crystal's temperature is elevated above the Curie point?
What type of transducer creates a short duration electrical spike that travels through the wire and strikes the PZT crystal?
This zone is also called the near zone.
This zone is also called the far zone.
What is the gradual spread of the ultrasound beam in the far field known as?
This type of resolution is parallel to the sound beam's main axis.
What is the only display mode that provides information regarding reflector motion with respect to time? (no dash)
What transducer contains a single, disc-shaped active element that is physically moved?
In linear phased arrays, what is the firing pattern that focuses a sound beam?
This parameter is the ultrasound system's ability to create numerous frames each second
What type of resolution will improve when frame rate increases?
This is a two-part process that changes the electrical signals within the receiver into a form more suitable for display on a monitor.
What determines the range of brilliancies within the displayed image?
This is the manipulation of image data after storage in the scan converter.
This is a set of rules, or protocols, that allows imaging systems to share information on a network.
Harmonic frequency sound waves arise from ______.
Bernoulli's Principle describes the relationship between velocity and _____ in a moving fluid.
During this, the diaphragm moves upward, increasing pressure in the chest.
The _____ effect is presented as a frequency shift when the source and the receiver are in motion relative to each other.
The phenomenon where high velocities appear in the opposite direction is called ______.
These appear on the display as multiple, equally spaced echoes.
These appear as a solid hyperechoic line directed downward when seen on a display.
_____ image artifact is created when sound reflects off a strong reflector and is redirected toward a second structure.
This artifact appears when sound energy is transmitted in a direction other than along the beam's main axis.
Doppler _____ assess the characteristics of all Doppler modalities.
The spectrum of frequencies emitted by a pulsed-wave transducer is known as _____.
This sound reflector is most dependent on the angle of incidence.
When you adjust the output power control, you affect what system component?
This transducer has the same distance between the scan lines in both the near and far fields.