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Related Experiment Videos

Hearing aid users benefit from induction loop when using digital cellular phones.

Martti Sorri1, Peeta Piiparinen, Kerttu Huttunen

  • 1Department of Otorhinolaryngology, University of Oulu, Finland. martti.sorri@oulu.fi

Ear and Hearing
|April 5, 2003
PubMed
Summary
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Induction loops significantly improve hearing aid compatibility with digital cellular phones, restoring landline phone performance. This technology offers a viable solution for electromagnetic interference issues experienced by hearing aid users.

Area of Science:

  • Audiology and Hearing Science
  • Biomedical Engineering
  • Telecommunications Technology

Background:

  • Hearing aid users report electromagnetic interference (EMI) issues with digital cellular phones.
  • This interference can significantly degrade the usability of phones for individuals with hearing impairments.

Purpose of the Study:

  • To evaluate the effectiveness of an induction loop system in mitigating EMI between digital cellular phones and hearing aids.
  • To compare the performance across different languages (Finnish and American English) and hearing aid technologies (analog vs. digital).

Main Methods:

  • Controlled laboratory study at two international hearing healthcare centers.
  • Participants were experienced behind-the-ear hearing aid users acting as their own controls.

Related Experiment Videos

  • Tested three listening conditions: landline phone, digital cellular phone alone, and digital cellular phone with an induction loop.

    • Main Results:

    • Digital cellular phones alone resulted in the poorest sentence recognition and subjective scores.
    • Using an induction loop with digital cellular phones yielded scores comparable to landline phones.
    • Analog hearing aids showed a significant drop in performance with digital phones alone (12.6%) compared to landline (62.4%), but recovered to 63.3% with the loop.
    • Digital hearing aids performed better with digital phones alone (37.4%) than analog but still lagged behind landline performance (62.4%); the loop improved scores to 57.6%.

    Conclusions:

    • Induction loop systems present a promising solution to the incompatibility between hearing aids and digital cellular phones.
    • The study highlights the potential of induction loops to restore communication quality for hearing aid users.
    • Further research is needed due to the limited models of induction loops and digital cellular phones tested.