Ultrasonic Surface Density Measurement Gauge
When ultrasonic waves penetrate a medium, part of the sound wave isabsorbed by the medium. Resulting in the penetration of the mediumafter the intensity of the sound wave relative to the intensity of theincident acoustic wave has a certain attenuation. The attenuation ratioand the surface density of the penetrated medium have a negativeexponential relationship. The surface density of the medium can bededuced from the attenuation of the acoustic wave intensity before andafter the acoustic wave penetrates the medium detected by thereceiving device.
