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Age-Related Differences in EEG-Based Speech Reception Threshold Estimation Using Scalp and Ear-EEG.

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Summary

The speech reception threshold (SRTneuro) can be reliably estimated in older adults using electroencephalography (EEG). This brainwave-based method shows similar precision across age groups, supporting hearing aid technology advancements.

Keywords:
EEGear-EEGneural decodingspeech intelligibility in noisespeech reception threshold

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Area of Science:

  • Neuroscience
  • Audiology
  • Signal Processing

Background:

  • Speech reception threshold (SRT) estimation via electroencephalography (EEG), termed SRTneuro, is feasible in younger adults.
  • Hearing aid use increases with age, necessitating age-appropriate hearing assessment tools.
  • Age-related neural changes may influence SRTneuro estimation accuracy.

Purpose of the Study:

  • Investigate age-related changes in the temporal response function (TRF).
  • Assess the feasibility and precision of SRTneuro estimation in older adults.
  • Compare SRTneuro estimation between younger and older normal-hearing participants.

Main Methods:

  • Recorded EEG from 20 younger and 22 older normal-hearing participants listening to speech in noise.
  • Utilized a linear decoder to reconstruct the speech envelope from EEG signals.
  • Calculated Pearson's correlation between reconstructed and stimulus envelopes to estimate SRTneuro.

Main Results:

  • SRTneuro was estimated with similar precision in both younger and older adults.
  • Older adults exhibited higher speech envelope reconstruction accuracy and TRF amplitudes.
  • In-ear and scalp EEG electrodes yielded comparable SRTneuro estimation precision across age groups.

Conclusions:

  • The SRTneuro estimation method is robust and effective in older individuals.
  • This brainwave-based approach holds potential for advancing hearing aid technology for age-related hearing loss.
  • Findings support the use of SRTneuro for continuous adaptation of noise-reduction algorithms in hearing aids.