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Design Example01:23

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An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
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Loudspeaker line array educational demonstration.

Brian E Anderson1, Brad Moser, Kent L Gee

  • 1Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, Utah 84602, USA. bea@byu.edu

The Journal of the Acoustical Society of America
|March 20, 2012
PubMed
Summary
This summary is machine-generated.

This study demonstrates an audio-range line array for teaching wave interference. The system allows real-time control of sound wave properties, offering a practical tool for acoustics education.

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Area of Science:

  • Acoustics
  • Physics Education

Background:

  • Wave interference is a fundamental concept in physics.
  • Traditional classroom demonstrations may lack quantitative precision or real-time control.

Purpose of the Study:

  • To present a physical demonstration of an audio-range line array for teaching interference.
  • To develop and test software for real-time control and steering of the array.
  • To provide educators with a tool for advanced acoustics courses.

Main Methods:

  • Developed custom software with a graphical interface for controlling frequency, phase shading, and amplitude shading.
  • Constructed an inexpensive, eight-element loudspeaker array.
  • Conducted directivity measurements in an anechoic chamber and a classroom.

Main Results:

  • The developed software effectively controls the loudspeaker array's real-time steering and shading.
  • Directivity measurements showed good agreement with theoretical predictions.
  • The array serves as both a qualitative and quantitative learning tool.

Conclusions:

  • The audio-range line array provides a viable and effective platform for demonstrating and teaching wave interference.
  • This system enhances acoustics education by offering hands-on, controllable experimentation.
  • The findings support the implementation of similar demonstrations in undergraduate and graduate acoustics courses.