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Related Experiment Videos

A tri-modal directional transducer.

John L Butler1, Alexander L Butler, Joseph A Rice

  • 1Image Acoustics, Inc., Cohasset, Massachusetts 02025, USA. jbutler@imageacoustics.com

The Journal of the Acoustical Society of America
|March 6, 2004
PubMed
Summary
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This study introduces a novel directional acoustic transducer using piezoelectric ceramic cylinders. It achieves broadband, directional sound with a frequency-independent beam pattern, offering a simple, small, and lightweight solution.

Area of Science:

  • Acoustic Engineering
  • Materials Science
  • Transducer Technology

Background:

  • Piezoelectric ceramic cylinders typically operate in omnidirectional modes.
  • Higher-order extensional modes can create directional acoustic radiation patterns.
  • Combining these modes allows for synthesized and steerable beam patterns.

Purpose of the Study:

  • To model the combined acoustic response of extensional modes in piezoelectric cylinders.
  • To develop a method for synthesizing desired directional radiation patterns.
  • To experimentally implement a broadband, directional acoustic transducer.

Main Methods:

  • Modeling the acoustic response of piezoelectric ceramic cylinder extensional modes.
  • Synthesizing directional beam patterns by combining modal responses.

Related Experiment Videos

  • Experimental validation of a tri-modal directional transducer.

    • Main Results:

    • Demonstrated a method for creating directional acoustic radiation patterns from piezoelectric cylinders.
    • Developed a tri-modal transducer exhibiting broadband operation.
    • Achieved a frequency-independent beam pattern with a simple, small, and lightweight design.

    Conclusions:

    • The proposed technique enables the creation of versatile directional acoustic transducers.
    • The tri-modal transducer offers significant advantages in terms of performance and form factor.
    • This approach advances the field of steerable acoustic beamforming technology.