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A Speech Perception Test in Simulated Reverberation Conditions.

Jaclyn B Spitzer, Sharon A Sandridge, Craig W Newman

American Journal of Audiology

|February 6, 2015

Summary

This summary is machine-generated.

New speech test materials (SPIN-Reverb) were created with varying reverberation. Listening performance decreased as reverberation increased for normal-hearing listeners and cochlear implant (CI) recipients.

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Area of Science:

Audiology
Speech Science
Acoustics

Background:

Assessing speech perception in noisy environments is crucial for hearing device users.
Simulating real-world acoustic challenges, like reverberation, is essential for accurate evaluations.
Existing speech tests may not fully capture the impact of reverberation on speech intelligibility.

Purpose of the Study:

To develop and validate new speech test materials (SPIN-Reverb) by applying reverberation treatments to sentences with varying contextual redundancy.
To investigate the impact of different reverberation times (RT60) on speech perception for normal-hearing listeners and cochlear implant (CI) recipients.

Main Methods:

Speech Perception in Noise-Revised (SPIN-R) sentences were modified to create SPIN-Reverb materials with four reverberation conditions (unprocessed, 600 ms, 1200 ms, 3600 ms RT60).
Phase 1: List equivalency was established using nonparametric bootstrapping with 75 normal-hearing listeners.
Phase 2: The utility of SPIN-Reverb was examined with 15 CI recipients.

Main Results:

Equivalent lists were identified across all reverberation conditions.
Speech perception performance significantly decreased with increasing reverberation time (RT60) for both high and low predictability sentences.
All tested reverberation conditions (unprocessed, RevCond 1, 2, 3) were significantly different from each other.
High- and low-predictability sentences showed significant differences within each reverberation condition.

Conclusions:

The SPIN-Reverb materials, particularly RevCond 1 (600 ms) and RevCond 2 (1200 ms), show promise as supplementary tools for cochlear implant (CI) assessment.
SPIN-Reverb offers a set of clinically feasible, graded difficulty materials that realistically simulate acoustic challenges for evaluating sensory devices.