A Comparison of the Underwater Acoustic Performance of Single Crystal vs. Piezoelectric Ceramic based Cymbal Projectors

Abstract

The underwater acoustic performance of three same-design "cymbal" based electro-acoustic projectors are compared. Two of these projectors contain PMN-PT single crystal piezoelectric as the active material while the third utilizes conventional PZT-5H piezoelectric ceramic. The units containing the single crystal material show an improvement in the acoustic source level anywhere from 3 to 15 dB over the frequency band 1-25 kHz. The higher source level is a consequence of the higher drive voltage capability of the single crystal materials. Under appropriate drive conditions, a single crystal cymbal-based projector that is 64 mm thick with an acoustic aperture of 101 mm X 101 mm can generate an acoustic source level of at least 175 dB (re: 1 microPa @ 1 m) from ~ 3 kHz to > 25 kHz.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2003
Accession Number
ADA498647

Entities

People

  • Dehua Huang
  • James F. Tressler
  • Thomas R. Howarth

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Actuators
  • Capacitance
  • Ceramic Matrix Composites
  • Composite Materials
  • Crystals
  • Displacement
  • Electrical Impedance
  • Frequency
  • Frequency Bands
  • Impedance
  • Materials
  • Materials Processing
  • Military Research
  • Piezoelectric Transducers
  • Single Crystals
  • Standards
  • Transducers

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Acoustics.
  • Materials Science and Engineering.