Portal de Periódicos da CAPES

A constant beamwidth transducer for ultrasonic applications

2006; Acoustical Society of America; Volume: 120; Issue: 5_Supplement Linguagem: Inglês

10.1121/1.4787354

1520-9024

Kim C. Benjamin, A. L. Van Buren, Jeffrey A. Szelag, Sheridan Petrie,

Flow Measurement and Analysis

A new class of transducers that produce uniform wide beams (∼20 deg) at ultrasonic frequencies (∼1–2 MHz) is being developed by the US Navy for ultrasonic applications. These transducers will provide a wide insonified field of view for two-dimensional ultrasonic imaging arrays. The design features a larger volume of active material, relative to conventional planar designs, which allows the application of higher drive fields. The prototype described in this article was driven to 200 VRMS and produced a sound pressure of 203 (dB re Pa at 1 m) at a frequency of 2.0 MHz. The details of the ultrasonic constant beamwidth transducer (CBT) design, its fabrication, and measured performance are presented. The ultrasonic CBT described in this paper will soon be incorporated into the Navy’s Underwater Sound Reference Division (USRD)’s Transducer Standards Loan Program.