Archives of Acoustics, 11, 1, pp. 53-60, 1986

Ultrasonics absorption measurements of a liquid with backed transducer

V. N. Bindal
National Physical Laboratory, New Delhi
India

T. K. Saksena
National Physical Laboratory, New Delhi
India

J. N. Som
National Physical Laboratory, New Delhi
India

An effect of backing of the transducer on the measured value of absorp-tion of a liquid have been shown using shock excited system. The resulting devia¬tion in the measured value of absorption from the accepted value has been observed to be large as 40 %, depending on the damping produced. A mecha¬nism to explain the observed variation of the measured value of absorption with backing has been put forward. Implication of the work in characteri¬sation of ultrasonic probe have been discussed.
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