A sound wave is - (correct answer) -mechanical, longitudinal
j. j. j. j. j. j. j. j.
A compression area of a sound wave is - (correct answer) -high pressure, high density
j. j. j. j. j. j. j. j. j. j. j. j. j. j.
A rarefaction area of a sound wave is - (correct answer) -low pressure, low density
j. j. j. j. j. j. j. j. j. j. j. j. j. j.
Which is considered an acoustic variable - (correct answer) -pressure
j. j. j. j. j. j. j. j. j.
Which is a unit for pressure - (correct answer) -N/m2
j. j. j. j. j. j. j. j. j.
Which is a unit for density - (correct answer) -lbs/cm3
j. j. j. j. j. j. j. j. j.
Which wave propagates in a medium - (correct answer) -sound
j. j. j. j. j. j. j. j. j.
The range for ultrasound is - (correct answer) -greater than 20KHz
j. j. j. j. j. j. j. j. j. j.
____ is the number of wave cycles per second - (correct answer) -frequency
j. j. j. j. j. j. j. j. j. j. j. j.
One kilohertz is equal to - (correct answer) -1,000 cycles per second
j. j. j. j. j. j. j. j. j. j. j.
One megahertz is equal to - (correct answer) -1,000,000 cycles per second
j. j. j. j. j. j. j. j. j. j. j.
The useful frequency range for clinical imaging ultrasound is - (correct answer) -2 MHz to
j. j. j. j. j. j. j. j. j. j. j. j. j. j.
10 MHz
j. j.
Frequency is determined by the - (correct answer) -source j. j. j. j. j. j. j. j.
Frequency affects all of the following, except: wavelength, resolution, penetration,
j. j. j. j. j. j. j. j. j.
impedance - (correct answer) -impedance
j. j. j. j. j.
The times per cycle is - (correct answer) -period
j. j. j. j. j. j. j. j.
The period for a 5 MHz probe is - (correct answer) -0.2usec
j. j. j. j. j. j. j. j. j. j. j.
If frequency increases, period will - (correct answer) -decreases
j. j. j. j. j. j. j. j.
, Period is determined by the - (correct answer) -source
j. j. j. j. j. j. j. j.
Period multiplied by the number of cycles in a pulse equals - (correct answer) -pulse
j. j. j. j. j. j. j. j. j. j. j. j. j. j.
duration
j.
The distance between cyclical peaks is - (correct answer) -wavelength
j. j. j. j. j. j. j. j. j.
The symbol for wavelength is - (correct answer) -lambda
j. j. j. j. j. j. j. j.
The wavelength of a 5 MHz probe in soft tissue is - (correct answer) -0.3 mm
j. j. j. j. j. j. j. j. j. j. j. j. j. j. j.
As frequency increases, wavelength (assume same medium) - (correct answer) -
j. j. j. j. j. j. j. j. j. j.
decreases
Wavelength is determined by the - (correct answer) -source and medium j. j. j. j. j. j. j. j. j. j.
As wavelength decreases - (correct answer) -resolution improves
j. j. j. j. j. j. j.
The rate at which a sound vibration propagates through a medium is called all of the
j. j. j. j. j. j. j. j. j. j. j. j. j. j. j.
following, except: sound speed, prop speed, speed of sound, velocity - (correct answer) -
j. j. j. j. j. j. j. j. j. j. j. j. j. j.
velocity
The units for propagation speed include all the following, except: km/sec, mph, msec,
j. j. j. j. j. j. j. j. j. j. j. j.
mm/sec - (correct answer) -msec
j. j. j. j. j.
The average speed of sound in soft tissue is - (correct answer) -1540 m/sec
j. j. j. j. j. j. j. j. j. j. j. j. j.
Arrange the following in increasing order of sound speed in soft tissue - (correct answer) -
j. j. j. j. j. j. j. j. j. j. j. j. j. j. j.
air, fat, muscle, soft tissue, muscle, bone
j. j. j. j. j. j.
The prop speed of sound of the ceramic lead zirconate titanate (PZT) is approx - (correct
j. j. j. j. j. j. j. j. j. j. j. j. j. j. j.
answer) -4000 m/sec
j. j. j.
speed of sound is determined by - (correct answer) -medium
j. j. j. j. j. j. j. j. j.
The peak variation minus the mean variation is - (correct answer) -amplitude
j. j. j. j. j. j. j. j. j. j. j.
All of the following are possible units for amplitude, except: degrees, decibels, Pascal,
j. j. j. j. j. j. j. j. j. j. j. j.
watts - (correct answer) -degrees
j. j. j. j. j.
The maximum variation of an acoustic variable is 60. The mean value is 45. The maximum
j. j. j. j. j. j. j. j. j. j. j. j. j. j. j.
value is 30. The amplitude is - (correct answer) -15
j. j. j. j. j. j. j. j. j. j.
Amplitude is determined by - (correct answer) -source j. j. j. j. j. j. j.
Which ultrasound machine control will affect amplitude - (correct answer) -output power
j. j. j. j. j. j. j. j. j. j. j.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Wisdoms. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
