13th Annual Conference of the International Speech Communication Association

Portland, OR, USA
September 9-13, 2012

Performance Comparison of Intrusive Objective Speech Intelligibility and Quality Metrics for Cochlear Implant Users

João Felipe Santos (1), Stefano Cosentino (2), Oldooz Hazrati (3), Philipos C. Loizou (3), Tiago H. Falk (1)

(1) Institut National de la Recherche Scientifique, INRS-EMT, Montréal, Canada
(2) Ear Institute, University College London (UCL), London, UK
(3) Department of Electrical Engineering, The University of Texas at Dallas, Richardson, Texas, USA

In this paper, we evaluate the performance of six intrusive objective measures as intelligibility predictors of degraded speech for cochlear implant (CI) users. Three practical environmental degradation scenarios are considered: reverberation alone, additive noise alone, and noise-plus-reverberation. A subjective intelligibility test was performed with eleven cochlear implant users and objective measures were evaluated using three performance metrics: Pearson, Spearman rank, and sigmoid-fitted correlation coefficients. It was observed that existing metrics performed well in the noise-alone scenarios, but obtained lower performance in the reverberation-alone scenario and in many cases, unacceptable results in the noise-plus-reverberation scenario. It is concluded that further work is still needed in order to accurately predict speech intelligibility ratings for CI users, particularly in environments corrupted by reverberation.

Index Terms: Objective Measures, Speech Intelligibility, Reverberation, Noise, Cochlear Implants

Full Paper

Bibliographic reference.  Santos, João Felipe / Cosentino, Stefano / Hazrati, Oldooz / Loizou, Philipos C. / Falk, Tiago H. (2012): "Performance comparison of intrusive objective speech intelligibility and quality metrics for cochlear implant users", In INTERSPEECH-2012, 1724-1727.