Physics Flashcards
Two objects start at the same point. One object moves at 5mph, the other at 15mph. A sound wave is sent to one object to the second object to measure frequency, what statement is true?
The Doppler frequency will be negitive
During transmission of a sound, some pulses are focused. All of the following are methods of focusing during transmission Except:?
Using a matching layer
An ultrasound system is on harmonic mode, the image displayed was created by reflections and a frequency of 6Mz. What is the frequency of sound emitted by transducer?
3mhz
All of the following are examples of post processing Except:?
Log compression
The sonographer can eliminate aliasing artifact experienced during Doppler exam by all of the following Except:?
Adjusting the baseline
A sound wave is propagating in tissue, it propagates tissue to bone the angle measured is 90 degrees, what described 90 degrees?
Oblique
Aliasing is an artifact observed when performing Doppler, what signal is most likely to alias?
7 MHz with a PRF of 3 kHz
Which of the following is most directly related to temporal resolution?
Frame rate
It is acceptable to describe a sound wave by all of the following except:?
Transverse
Two similar reflections appear on ultrasound at exactly the same depth, one is artifact, the other may be all of the following except:?
Mirror image
The term frequency is defined as?
Source of sound
Propagation speed is dependent on?
The medium though which the sound wave passes
As the frequency of acoustic variables increases, the wavelength?
Decreases
The term period is related to frequency because it is?
The reciprocal of frequency
Wavelength is measured in?
Millimeters
