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Related Experiment Video

Updated: Nov 11, 2025

Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
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Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention

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High-resolution spherical directivity of live speech from a multiple-capture transfer function method.

Timothy W Leishman1, Samuel D Bellows1, Claire M Pincock1

  • 1Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, N284 Eyring Science Center, Provo, Utah 84602, USA.

The Journal of the Acoustical Society of America
|March 26, 2021
PubMed
Summary
This summary is machine-generated.

This study provides the first comprehensive spherical measurement of human speech directivity using live speech. These detailed directivity patterns aid research in acoustics, audio, and communication systems.

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Area of Science:

  • Acoustics
  • Speech Science
  • Signal Processing

Background:

  • Human speech radiation directivity is crucial for understanding sound propagation.
  • Previous research lacked high-resolution, complete spherical measurements using natural speech.

Purpose of the Study:

  • To measure human speech directivity over a complete sphere with high spatial and spectral resolution.
  • To provide a detailed dataset for speech modeling and acoustical simulations.

Main Methods:

  • Employed a multiple-capture transfer function technique.
  • Utilized spherical harmonic expansions for data analysis.
  • Collected data from eight subjects at 2522 sampling positions on a 1.22 or 1.83 m sphere.

Main Results:

  • Achieved unprecedented high spatial (5° increments) and spectral resolution of speech directivity.
  • Validated results against KEMAR simulator, lower-resolution data, and theoretical expectations.
  • Generated comprehensive spherical speech directivity patterns.

Conclusions:

  • The detailed measurements offer novel insights into speech radiation patterns.
  • Findings will benefit researchers in speech science, architectural acoustics, audio, and communications.
  • Archived results are available for further exploration and application.