Clinical and Experimental Otorhinolaryngology (May 2022)

Electroacoustic Evaluation of Smartphone-Based Hearing Aid Applications

  • Willy Nguyen,
  • Miseung Koo,
  • Jun Ho Lee,
  • Seung-Ha Oh,
  • Moo Kyun Park

DOI
https://doi.org/10.21053/ceo.2021.01004
Journal volume & issue
Vol. 15, no. 2
pp. 135 – 143

Abstract

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Objectives This study evaluated the electroacoustic characteristics of smartphone-based hearing aid applications (apps). Methods We investigated hearing aid apps based on processing delay measurements, hearing instrument testing, simulated real ear measurements, and a head-and-torso simulator. Results Many apps exceeded the recommended level for processing delay. Hearing instrument testing showed the highest amplification characteristics and the best sound quality when a hearing aid was used, followed by the high-end apps and then the low-end apps. The simulated real ear measurements results showed that the high-end apps had a better ability to match the amplification targets than the low-end apps, but there was no consistent pattern among apps when controlling the output. Only a few apps could improve the signal-to-noise ratio in the head-and-torso simulator. Conclusion Most of the apps showed relatively poor electroacoustic performance in comparison with hearing aids. Generalizing access to hearing care through hearing aid apps induces a wide diversity of hearing performance with no fixed standard for reliability. However, we expect their overall quality to improve over the next few years.

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