Title :
Gaussian ultrasonics: theory and practice
Author :
Breazeale, M.A. ; Huang, Dehua
Author_Institution :
Nat. Center for Phys. Acoust., Mississippi Univ., MS, USA
Abstract :
A novel way is presented to describe the diffraction field of a Gaussian source. The derivation does not require the parabolic approximation used by previous authors. An improved spherical button Gaussian transducer design is applied successfully to make kilohertz Gaussian transducers. An ultrasonic Gaussian transducer of 15.24 cm (6") diameter, operated at 267 kHz is tested intensively. The experimental results show that the sidelobe suppression is 35 db. Thus, the sound fields generated by Gaussian transducers agree very well with the theoretical predictions
Keywords :
Gaussian processes; acoustic field; ultrasonic absorption; ultrasonic diffraction; ultrasonic transducers; 15.24 cm; 267 kHz; 35 dB; Gaussian source; Gaussian transducers; Gaussian ultrasonics; diffraction field; improved spherical button Gaussian transducer design; kilohertz Gaussian transducers; sidelobe suppression; sound fields; ultrasonic Gaussian transducer; Electric potential; Fresnel reflection; Harmonic analysis; Image analysis; Integral equations; Sufficient conditions; Ultrasonic transducers; Velocity control;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495643
