Development and validation of a spectro-temporal processing test for cochlear-implant listeners.
Turner, Richard E
The Journal of the Acoustical Society of America
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Archer-Boyd, A., Southwell, R. V., Deeks, J., Turner, R. E., & Carlyon, B. (2018). Development and validation of a spectro-temporal processing test for cochlear-implant listeners.. The Journal of the Acoustical Society of America, 144 (5), 2983. https://doi.org/10.1121/1.5079636
Psychophysical tests of spectro-temporal resolution may aid the evaluation of methods for improving hearing by cochlear implant (CI) listeners. Here the STRIPES (Spectro-Temporal Ripple for Investigating Processor EffectivenesS) test is described and validated. Like speech, the test requires both spectral and temporal processing to perform well. Listeners discriminate between complexes of sine sweeps which increase or decrease in frequency; difficulty is controlled by changing the stimulus spectro-temporal density. Care was taken to minimize extraneous cues, forcing listeners to perform the task only on the direction of the sweeps. Vocoder simulations with normal hearing listeners showed that the STRIPES test was sensitive to the number of channels and temporal information fidelity. An evaluation with CI listeners compared a standard processing strategy with one having very wide filters, thereby spectrally blurring the stimulus. Psychometric functions were monotonic for both strategies and five of six participants performed better with the standard strategy. An adaptive procedure revealed significant differences, all in favour of the standard strategy, at the individual listener level for six of eight CI listeners. Subsequent measures validated a faster version of the test, and showed that STRIPES could be performed by recently implanted listeners having no experience of psychophysical testing.
Humans, Hearing Tests, Acoustic Stimulation, Cochlear Implantation, Cochlear Implants, Cues, Auditory Perception, Pitch Discrimination, Speech Perception, Psychoacoustics, Psychometrics, Bionics, Noise, Time Factors, Adult, Aged, Aged, 80 and over, Middle Aged, Female, Male
Oticon Fonden (Case No. 18-0896)
External DOI: https://doi.org/10.1121/1.5079636
This record's URL: https://www.repository.cam.ac.uk/handle/1810/290593
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/