Abstract
A transducer capable of penetrating marine sediments with multiple, rectangular beams which are broad (20°–30°) in one plane and narrow (2°–3°) in the other plane at frequencies of 10–20 kHz was desired. Transducer size constraints prohibited attaining such a beam conventionally; thus, parametric operation of a rectangular transducer was examined. A relatively high parametric source level of 190 dB re 1 μPa at 1 m was also desired, and the resulting cavitation and acoustic intensity considerations dictated a curved-face transducer design. Primary and parametric beam patterns and propagation data obtained for both a rectangular transducer and a curved-face transducer confirmed the prediction techniques being employed. Parametric beam patterns in the broad plane exhibited minor lobes with the minor-lobe structure of the curved-face transducer beam less pronounced than that experienced with the rectangular transducer. Sound pressure levels and beam patterns measured for the curved-face projector confirmed that a curved-face transducer can be operated parametrically to produce high-power, low-frequency rectangular beams.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
