SPI Exam- Ultrasound Physics Summary
2024-2025 Questions & Verified Correct
Answers. Graded A+
-10dB - ANS1/10 of the original value.
-3dB - ANS1/2 the original value.
10dB - ANSmeans ten times bigger. Ad a 0 for each 10dB.
3dB - ANSmeans two times bigger.
Amplitude ____________as sound propagates through the body. - ANSdecreases
Amplitude - ANSdifference between average value and maximum value. Peak to peak
(maximum to minimum. The strength of the reflector.
Attenuation - ANSThe decrease in intensity, power and amplitude of a sound as it
travels. Is unrelated to speed.
Attenuation coefficient - ANSis related to frequency. The amount of attenuation per
centimeter. A way to report attenuation without dealing with distance.
Bulk modulus - ANSStiffness
Compressions - ANSHigher density & pressure.
Density - ANSMass within volume. The amount of mass in an object.
Density and propagation speed are ____________ - ANSinversely related. (opposite
directions)
Distance - ANSParticle motion.
Duty Factor - ANSpercentage or fraction of time that the system transmits sound.
Frequency - ANSnumber of cycles that occur in one second.
higher frequency attenuation coefficient________. - ANSattenuation coefficient
increases. Lower frequency are used to image deeper.
Higher frequency sound undergoes more ___________. - ANSRayleigh Scattering
Higher frequency wave have ________ Wavelength - ANSshorter wavelength
2024-2025 Questions & Verified Correct
Answers. Graded A+
-10dB - ANS1/10 of the original value.
-3dB - ANS1/2 the original value.
10dB - ANSmeans ten times bigger. Ad a 0 for each 10dB.
3dB - ANSmeans two times bigger.
Amplitude ____________as sound propagates through the body. - ANSdecreases
Amplitude - ANSdifference between average value and maximum value. Peak to peak
(maximum to minimum. The strength of the reflector.
Attenuation - ANSThe decrease in intensity, power and amplitude of a sound as it
travels. Is unrelated to speed.
Attenuation coefficient - ANSis related to frequency. The amount of attenuation per
centimeter. A way to report attenuation without dealing with distance.
Bulk modulus - ANSStiffness
Compressions - ANSHigher density & pressure.
Density - ANSMass within volume. The amount of mass in an object.
Density and propagation speed are ____________ - ANSinversely related. (opposite
directions)
Distance - ANSParticle motion.
Duty Factor - ANSpercentage or fraction of time that the system transmits sound.
Frequency - ANSnumber of cycles that occur in one second.
higher frequency attenuation coefficient________. - ANSattenuation coefficient
increases. Lower frequency are used to image deeper.
Higher frequency sound undergoes more ___________. - ANSRayleigh Scattering
Higher frequency wave have ________ Wavelength - ANSshorter wavelength
