Title :
Diffraction effects in hydrophone measurements
Author :
Goldstein, Albert ; Gandhi, Darshan R. ; O´Brien, William D., Jr.
Author_Institution :
Dept. of Radiol., Detroit Receiving Hosp., Detroit, MI, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
Theoretical and experimental methodology are presented for accurately determining the effective radii of unfocused, circular plane piston transducers as well as using tone burst hydrophone measurements to verify steady-state theoretical calculations. Experiments using two specially fabricated unfocused, composite piezoelectric transducers demonstrate the validity of the methodology. For spherically focused circular transducers, a simple model is used to estimate the transient diffraction encountered in co-axial flat hydrophone measurements.
Keywords :
hydrophones; piezoelectric transducers; ultrasonic diffraction; ultrasonic measurement; ultrasonic transducers; co-axial flat hydrophone measurement; composite piezoelectric transducer; effective radius; spherically focused circular transducer; tone burst hydrophone measurement; transient diffraction; unfocused circular plane piston transducer; Diffraction; Piezoelectric transducers; Pistons; Sonar equipment; Steady-state;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on