A 300 Hz Janus-Helmholtz transducer for ocean acoustic tomography

Author

Gal, Y. Le ; Boucher, D. ; Lunon, X. ; Bruneau, A.M.

Author_Institution

LSM, DON Ingenierie Sud, Six-Fours-Les-Plages, France

fYear

1993

fDate

18-21 Oct 1993

Abstract

Ocean acoustic tomography has need for low frequency and high efficiency transducers, in order to reach ranges greater than 500 km with large bandwidth and great depth capability. The characteristics of the Janus-Helmholtz transducer, designed by DCN Ingenierie Sud, widely answer these contradictory requirements. However, as acoustic tomography requires lower frequencies (a working frequency band around 400 Hz is expected), several Janus-Helmholtz transducers with a lower first resonance frequency have been modelled with the finite-element code ATILA. In addition, for other applications, a larger projector with a first resonance frequency at 160 Hz has been defined. Some new insights of the transducer response interpretation are also given

Keywords

acoustic transducers; oceanographic equipment; oceanographic techniques; underwater sound; 100 to 400 Hz; ATILA; DCN Ingenierie Sud; Janus-Helmholtz transducer; acoustic generator; acoustic tomography; acoustic transducer; equipment; finite-element code; high efficiency transducer; instrument; long range; low frequency; low frequency sound generator; measurement technique; ocean acoustic tomography; underwater sound; Acoustic transducers; Bandwidth; Instruments; Neck; Oceans; Piezoelectric transducers; Resonance; Resonant frequency; Sea measurements; Tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '93. Engineering in Harmony with Ocean. Proceedings

Conference_Location

Victoria, BC

Print_ISBN

0-7803-1385-2

Type

conf

DOI

10.1109/OCEANS.1993.325998

Filename

325998