Xc. Chen et al., ACOUSTIC COUPLING FROM A FOCUSED TRANSDUCER TO A FLAT PLATE AND BACK TO THE TRANSDUCER, The Journal of the Acoustical Society of America, 95(6), 1994, pp. 3049-3054
An approximate solution for the acoustic coupling factor (the diffract
ion correction function) from a focused transducer to a flat plate and
back to the transducer is provided. This function is useful for syste
m calibrations where a pulse-echo system or transmit-receive system is
used. Numerical solutions are provided for the important case where t
he hat plate is placed near the focal plane of the transducer. The sol
ution for a hat disk transducer is obtained as a limiting case. Experi
mental evidence for a focused transducer is provided.