A
parallel beam of ultrasound passes through a thickness of 4.0 cm of muscle. It
is then incident normally on a bone having a specific acoustic impedance of 6.4
× 106 kg m−2 s−1. The bone is 1.5 cm thick. Using data
from Table
14.2,
calculate the fraction of the incident intensity that is transmitted through
the muscle and bone.
Table
14.2 Some values of linear absorption
(attenuation) coefficient for ultrasound
Where did 1.7*10^6 come from??
ReplyDeleteIt's the specific acoustic impedance of muscle.
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