Principle

The velocity of sound in acrylics shall be determined by time of flight reflection technique with an ultrasonic echoscope. The measurements are done by reflection method, on three cylinders of different length. Two measurement series are carried out with ultrasonic probes of different frequencies.

Benefits


Introductory experiment for echoscopy applications

Experiment can be easily extended to perform A-scan and B-scan experiments

With further extensions more advanced experiments with medical and material sciences context can be performed


Tasks


Measure the length of the three cylinders with the caliper.

Determine the time of flight of the ultrasonic reflection pulses for the three cylinders and the two ultrasonic probes.

Calculate the sound velocities, probe delays and use the two mean values obtained to calculate the cylinder length.


What you can learn about


Sound velocity

Propagation of ultrasonic waves

Time of flight

Ultrasonic echography

Thickness measurement

Probe delay