Journal or Book Title
Journal of the Acoustical Society of America
A Monte Carlo technique is described for predicting the ultrasonic noise backscattered from the microstructure of polycrystalline materials in a pulse/echo immersion inspection. Explicit results are presented for equiaxed, randomly oriented aggregates of either cubic or hexagonal crystallites. The model is then tested using measured noise signals. Average and peak noise levels and the distribution of the noise voltages are studied as the density of grains changes.
Acoustical Society of America
Yalda, Isaac; Thompson, R. Bruce; and Margetan, Frank J., "Predicting ultrasonic grain noise in polycrystals: A Monte Carlo model" (1996). Center for Nondestructive Evaluation Publications. 9.