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Related Experiment Videos

Underwater tunable organ-pipe sound source.

Andrey K Morozov1, Douglas C Webb

  • 1Webb Research Corporation, East Falmouth, Massachusetts 02536, USA. moro@webbresearch.com

The Journal of the Acoustical Society of America
|August 4, 2007
PubMed
Summary
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A novel frequency-controlled sound source utilizes a tunable underwater acoustic resonator for applications in ocean tomography. This system efficiently achieves wide spectrum width by tuning resonance frequency with transmitted signals.

Area of Science:

  • Acoustics
  • Oceanography
  • Signal Processing

Background:

  • Underwater acoustic resonators are crucial for applications like ocean-acoustic tomography.
  • Efficient frequency control is needed for advanced acoustic sensing and imaging.

Purpose of the Study:

  • To describe a highly efficient frequency-controlled sound source based on a tunable high-Q underwater acoustic resonator.
  • To analyze the feasibility and performance of such a source for ocean-acoustic and seismic tomography.

Main Methods:

  • Mathematical analysis and numerical simulation of a Helmholtz resonator and a tunable organ pipe.
  • Modeling the tunable organ pipe as a transmission line segment.
  • Investigating a "state-switched" concept for frequency sweeping in high-Q resonators.

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Main Results:

  • Demonstrated the Helmholtz resonator's capability for instant resonant frequency switching.
  • Numerical simulations confirmed the "state-switched" concept in a high-Q tunable organ pipe.
  • Analyzed the speed of frequency sweeping in the tunable organ pipe, with results applied to a projector design.

Conclusions:

  • A tunable high-Q underwater acoustic resonator can efficiently generate frequency-controlled sound.
  • The developed concept and models are applicable to various tunable resonators for acoustic tomography.
  • The findings support the design of advanced acoustic projectors for ocean exploration.