Quiz 3 Review

____________ is the maximum variation in an acoustic variable

Amplitude is the difference between the ________ and the ________

What initially determines the amplitude of the wave?

How can the sonographer adjust the amplitude?

_____________ is the rate at which energy is transmitted into the body

Power is expressed with what unit?

Power is initially determined by what?

What is the relationship between power and amplitude?

What is the equation for Power & Amplitude?

_________________ is the concentration of power in an area

What is the intensity equation?

What initially determines the intensity?

What is the relationship between intensity and area?

What is the highest intensity value?

What is the lowest intensity value?

____________________ is the weakening of sound as it travels

Attenuation is expressed in what units?

What are the 3 components of attenuation?

What is the dominant factor in attenuation?

With absorption, Energy is converted into ___________

What are the two types of scatter?

What is an example of a rayleigh scatterer?

The amount that sound is attenuated depends on ___________ & ___________

_________________ is the amount of attenuation of sound per centimeter of travel

What is the equation for attenuation coefficient?

What is the equation for overall attenuation?

What is the attenuation coefficient of 5 MHz?

What is the overall attenuation of a 6 MHz transducer with a round trip distance of 6 cm

__________________ is the depth in tissue where the original intensity of sound is 1/2 its original value

What are the other names for the half value layer?

What is the equation for the HVL?

What is the relationship between HVL and AC?

What is the HVL for a 3 MHz transducer?

What is the relationship between power and intensity?

-3 dB =

What is the equation for Intensity and Amplitude?

What 4 things can happen to sound when it hits a boundary?

What type of reflections arise from large smooth boundaries?

What happens when sound hits a boundary that is irregular or rough?

Scattering allows us to see ____________________

With _________________ scatter, sound is redirected in all different directions

What is the relationship between rayleigh scatter, backscatter and frequency?

________________ is the sound that is coming from the sound source and going to the medium

________________ is the sound that continues to propagate forward after hitting a boundary

______________ is the sound that hits a boundary and returns

Normal incidence occurs when the sound beam hits the boundary at what angle?

What are the other names for normal incidence?

What is it called when sound does not hit a boundary at a 90 degree angle?

Is the majority of sound transmitted or reflected?

The incidenent sound must equal the _______________ + _____________

________________ is the intensity of the sound before it hits a boundary

______________ is the intensity of the sound after it hits a boundary and comes back towards the probe

______________ is the intensity of sound that continues to propagate forward after it hits a boundary

The incident intensity must equal the _____________ & ___________

What is needed in order for reflection to occur?

What is intensity reflection coefficient (IRC)?

What is the intensity transmission coefficient (ITC)?

IRC + ITC must equal

If the IRC is 88%, how much is the ITC?

If there is no difference between 2 boundaries (2 mediums) there will be no ____________

If there is no reflection then the ITC will ______%

A sound wave with an intensity of 40 W/cm squared strikes a boundary and it is totally reflected, what is the IRC?

A sound wave with an intensity of 36 W/cm squared strikes a boundary and it totally reflected. What is the reflected intensity?