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1. |
Which of the following formulas is used for the calculation of ultrasonic attenuation coefficient (α)?# |
A. | α = 10 log(A<sub>0</sub>/A)/X |
B. | α = 20 log(A<sub>0</sub>/A)*X |
C. | α = 10 log(A<sub>0</sub>/A)*X |
D. | α = 20 log(A<sub>0</sub>/A)/X |
Answer» E. | |