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The modal projector.

John L Butler1, Alexander L Butler, Stephen C Butler

  • 1Image Acoustics, Inc, 97 Elm Street, Cohasset, Massachusetts 02025, USA. jbutler@imageacoustics.com

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Summary
This summary is machine-generated.

This study introduces a novel "modal projector" transducer that enhances sound directionality. This compact acoustic device improves directivity and reduces power requirements for sound sources.

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Area of Science:

  • Acoustics and Materials Science
  • Transducer Technology

Background:

  • Directionality in acoustic projectors is crucial for focused sound.
  • Compact sound sources often struggle with achieving significant directivity.

Purpose of the Study:

  • To present the foundational principles and practical examples of a
  • modal projector
  • transducer.
  • To demonstrate the effectiveness of this transducer in improving directivity and reducing power consumption.

Main Methods:

  • Development and analysis of piezoelectric ceramic, single crystal, and magnetostrictive modal projectors.
  • Experimental measurements and analytical modeling.
  • Finite Element Analysis (FEA) modeling for performance validation.

Main Results:

  • Demonstrated good agreement between measured, analytical, and FEA modeled results.
  • Established the modal projector as a viable acoustic intensity source.
  • Achieved an improved directivity index compared to conventional compact sources.

Conclusions:

  • The modal projector offers a viable solution for compact, directional acoustic sources.
  • This technology enhances directivity, leading to reduced power demands.
  • The presented transducer designs are effective across various material types.