EDELMAN SPI FINAL EXAM 2 VERSIONS 2025 BANK QUESTIONS WITH 100% DETAILED ANSWERS /UPDATED AND ALREADY GRADED A+

EDELMAN SPI FINAL EXAM 2 VERSIONS 2025 BANK

QUESTIONS WITH 100% DETAILED ANSWERS

/UPDATED AND ALREADY GRADED A+




Attenuation is determined by which of the following

factors?




A. density and stiffness of the medium

B. frequency of sound and propagation speed

C. PRF of sound and path length

D. path length and frequency of sound - ANSWER-D. path

length and frequency of sound

,The factors that determine the degree to which a sound

beam weakens are:




1. The distance that the sound travels, and

2. the frequency of the sound.

As a pulse passes through soft tissue, a certain amount of

acoustic energy remains in the tissue as heat. What is this

constituent of attenuation called?




A. scattering

B. absorption

C. refraction

D. rarefaction - ANSWER-B. absorption

,The conversion of acoustic energy into heat is called

absorption. This process deposits a portion of the energy

from the beam into the soft tissues.




What is the amount of attenuation per centimeter that a

sound wave undergoes called?




A. beam uniformity coefficient

B. attenuation coefficient

C. attenuation

D. duty factor - ANSWER-B. attenuation coefficient




the attenuation coefficient reports a sound beam's

decibels of attenuation per centimeter. This is a useful tool

, as its value remains constant, regardless of the actual

path length.




A sound beam travels 9 cm in soft tissue. The attenuation

coefficient is 3 dB/cm. What is the total attenuation that the

sound beam experienced?




A. 9 dB

B. 3 dB

C. 27 dB

D. 18 dB - ANSWER-C. 27 dB




To calculate total attenuation, multiply path length by

attenuation coefficient.