Spheres for calibrating an eleven-frequency acoustic measurement system
Original version
This report is not to be cited without prior reference to the authorAbstract
Calibration of a single resonant transducer by standard sphere is a
simple matter. How does one calibrate an array composed of eleven
different resonant transducers spanning the frequency range from 27 to 710
kHz? A solution is given by specifying the diameters and target strengths
of four precision ball bearings made from tungsten carbide with 6% cobalt
binder.