SPI PRACTICE questions exam 1 with correct answers 2024
5 views 0 purchase
Course
SPI
Institution
SPI
What best describes a sound wave? -answer- A mechanical longitudinal wave
What MUST be different on the two sides of an interface for refraction to occur? -answer- Propagation speed of sound and oblique incidence
The characteristic acoustic impedance of a medium equals the product of -answer-...
SPI PRACTICE questions exam 1 with
correct answers 2024
What best describes a sound wave? -answer- ✔A mechanical longitudinal wave
What MUST be different on the two sides of an interface for refraction to occur? -
answer- ✔Propagation speed of sound and oblique incidence
The characteristic acoustic impedance of a medium equals the product of -answer-
✔density and speed of sound
Ultrasonic attenuation is considered to consist of two parts scattering and absorption.
Absorption is -answer- ✔local conversion of ultrasound energy to heat
Which of the following has the greatest effect on the focal length of a single element
transducer? -answer- ✔Doubling the element diameter
Spatial pulse length is the product of the number of cycles in the pulse and the -answer-
✔wavelength
Manipulating the output power control of an ultrasound instrument does NOT affect the -
answer- ✔pulse repetition frequency
What will be affected by the power? -answer- ✔echo amplitude
beam intensity
acoustic exposure to the patient
display dot brightness
On pulse-echo equipment, the transducer actually transmits -answer- ✔under 1% of the
time
Ultrasonic intensity is measured in units of -answer- ✔energy per unit time per unit area
(Watt)
watt= -answer- ✔joules/second
What fraction of ultrasonic energy is typically reflected at soft tissue interfaces? -
answer- ✔1%
If the reflected signal intensity from Object 1 is ten times greater than Object 2, what is
the dB difference in reflected intensity between Object 1 and Object 2? -answer- ✔10
dB
SPI PRACTICE questions exam 1
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 PossibleA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.69. You're not tied to anything after your purchase.
