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BPACE: A Bayesian, Patient-Centered Procedure for Matrix Speech Tests in Noise.

Christoph Schmid1, Wilhelm Wimmer1,2, Martin Kompis1

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, Bern University Hospital, Inselspital, Bern, Switzerland.

Trends in Hearing
|July 28, 2023
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Summary

A new matrix sentence test procedure improves listening comfort and reduces testing time. This method offers comparable accuracy to traditional tests, benefiting cochlear implant users and normal hearing individuals.

Keywords:
adaptive procedurelistening effortpsychometric functionsignal-to-noise ratiospeech in noise

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Area of Science:

  • Audiology
  • Speech perception research
  • Psychophysics

Background:

  • Matrix sentence tests in noise are crucial for assessing speech intelligibility but can be time-consuming and demanding for listeners.
  • Optimizing the balance between test duration, listener comfort, and result precision is essential for clinical and research applications.

Purpose of the Study:

  • To develop and evaluate a novel, efficient test procedure for matrix sentence testing in noise.
  • To determine psychometric function parameters (threshold, slope, lapse-rate) with reduced listener challenge and introduce a 'credible interval' for reliability estimation and test termination.

Main Methods:

  • Implementation of an updated maximum likelihood method in a German matrix sentence test.
  • Comparison of the novel procedure against a STAIRCASE method in 20 cochlear implant patients and 20 normal hearing participants.
  • Utilizing a 'credible interval' as a termination criterion to estimate reliability and reduce test duration.

Main Results:

  • The novel procedure demonstrated comparable accuracy and reliability to the STAIRCASE method.
  • Listeners reported lower effort with the new procedure.
  • Average test duration was reduced by 1.3 minutes when using a 2 dB credible interval as a termination criterion compared to testing 30 sentences.

Conclusions:

  • The developed maximum likelihood-based procedure offers an efficient alternative for matrix sentence testing, enhancing listener comfort and reducing test time.
  • Normal hearing individuals and well-performing cochlear implant users particularly benefit from the shortened test duration.
  • The procedure's adaptability allows for application in various languages beyond German.