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Respiration mask waveguide optimisation for maximised speech intelligibility.

Kirill Kolesnik1, David Bryan1, William Harley1

  • 1Biomedical Engineering Department, The University of Melbourne, Melbourne 3010, Australia.

The Journal of the Acoustical Society of America
|October 2, 2021
PubMed
Summary
This summary is machine-generated.

Reusable masks improve communication by using optimized sound waveguides. This technology enhances speech intelligibility (SII) for personal protective equipment (PPE), addressing limitations of current mask materials.

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Area of Science:

  • Acoustic Engineering
  • Biomedical Engineering
  • Materials Science

Background:

  • Disposable face masks present scarcity and environmental concerns, driving demand for reusable alternatives.
  • Current reusable masks, often made of silicone or hard polymers, can impede speech intelligibility.
  • Effective personal protective equipment (PPE) must balance filtration with clear communication.

Purpose of the Study:

  • To develop a numerical optimization approach for waveguide topology in reusable masks.
  • To enhance acoustic energy transmission for improved speech intelligibility.
  • To adapt existing resuscitator masks into effective PPE with enhanced communication capabilities.

Main Methods:

  • Numerical optimization of waveguide topology to maximize acoustic energy in speech-relevant frequency bands.
  • Application of the optimization method to a silicone resuscitator mask.
  • Experimental validation of the fabricated device to measure speech intelligibility index (SII).

Main Results:

  • The numerical optimization successfully identified waveguide designs to maximize acoustic energy for speech.
  • The adapted resuscitator mask demonstrated improved speech intelligibility index (SII) in experimental tests.
  • The fabricated device effectively filters air while enhancing vocal communication.

Conclusions:

  • A novel numerical optimization approach can enhance sound transmission in reusable masks.
  • This method effectively improves speech intelligibility, a critical factor for PPE usability.
  • The developed technology offers a practical solution for improving communication in healthcare and other settings using PPE.