Which of the following formulas is used for the calculation of ultrasonic attenuation coefficient (α)?(a) α = 10 log(A0/A)/X(b) α = 20 log(A0/A)*X(c) α = 10 log(A0/A)*X(d) α = 20 log(A0/A)/XThis question was addressed to me in exam.This intriguing question originated from Inspection Procedures in division Inspection Testing in Foundries of Casting-Forming-Welding I

Which of the following formulas is used for the calculation of ultraso

1.	Which of the following formulas is used for the calculation of ultrasonic attenuation coefficient (α)?(a) α = 10 log(A0/A)/X(b) α = 20 log(A0/A)X(c) α = 10 log(A0/A)X(d) α = 20 log(A0/A)/XThis question was addressed to me in exam.This intriguing question originated from Inspection Procedures in division Inspection Testing in Foundries of Casting-Forming-Welding I
Answer» The correct answer is (d) α = 20 log(A0/A)/X To explain I WOULD say: Ultrasonic attenuation coefficient (α) is calculated from the following equation- α = 20 log(A0/A)/X Where, A0 and A are the ULTRASOUND AMPLITUDES before and after travelling through the material, and X is the travel distance. The measurement of attenuation coefficient is mainly USED to find qualitative and quantitative information on the internal structure of PRODUCTS or castings.

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