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1. Comparisons of electrophysiological and psychophysical fitting methods for cochlear implants

Author

Müller-Deile, Joachim, Neben, Nicole, Dillier, Norbert; https://orcid.org/0000-0002-6394-6915, Büchner, Andreas, Mewes, Alexander, Junge, Friederike, Lai, Waikong, Schuessler, Mark, Hey, Matthias, Müller-Deile, Joachim, Neben, Nicole, Dillier, Norbert; https://orcid.org/0000-0002-6394-6915, Büchner, Andreas, Mewes, Alexander, Junge, Friederike, Lai, Waikong, Schuessler, Mark, and Hey, Matthias

Abstract

Objective: This study compared two different versions of an electrophysiology-based software-guided cochlear implant fitting method with a procedure employing standard clinical software. The two versions used electrically evoked compound action potential (ECAP) thresholds for either five or all twenty-two electrodes to determine sound processor stimulation level profiles. Objective and subjective performance results were compared between software-guided and clinical fittings. Design: Prospective, double-blind, single-subject repeated-measures with permuted ABCA sequences. Study sample: 48 post linguistically deafened adults with ≤15 years of severe-to-profound deafness who were newly unilaterally implanted with a Nucleus device. Results: Speech recognition in noise and quiet was not significantly different between software- guided and standard methods, but there was a visit/learning-effect. However, the 5-electrode method gave scores on the SSQ speech subscale 0.5 points lower than the standard method. Clinicians judged usability for all methods as acceptable, as did subjects for comfort. Analysis of stimulation levels and ECAP thresholds suggested that the 5-electrode method could be refined. Conclusions: Speech recognition was not inferior using either version of the electrophysiology-based software-guided fitting method compared with the standard method. Subject-reported speech perception was slightly inferior with the five-electrode method. Software-guided methods saved about 10 min of clinician's time versus standard fittings. Keywords: Cochlear implant; electrically evoked compound action potential; patient-reported outcome; psychophysical measurement; randomised controlled trial; speech recognition.

Published
2023

2. Comparisons of electrophysiological and psychophysical fitting methods for cochlear implants

Author

Müller-Deile, Joachim, Neben, Nicole, Dillier, Norbert, Büchner, Andreas, Mewes, Alexander, Junge, Friederike, Lai, Waikong, Schuessler, Mark, Hey, Matthias, and University of Zurich

Subjects
Speech and Hearing, Linguistics and Language, 610 Medicine & health, 10045 Clinic for Otorhinolaryngology, Language and Linguistics
Abstract

This study compared two different versions of an electrophysiology-based software-guided cochlear implant fitting method with a procedure employing standard clinical software. The two versions used electrically evoked compound action potential (ECAP) thresholds for either five or all twenty-two electrodes to determine sound processor stimulation level profiles. Objective and subjective performance results were compared between software-guided and clinical fittings.Prospective, double-blind, single-subject repeated-measures with permuted ABCA sequences.48 post linguistically deafened adults with ≤15 years of severe-to-profound deafness who were newly unilaterally implanted with a Nucleus device.Speech recognition in noise and quiet was not significantly different between software- guided and standard methods, but there was a visit/learning-effect. However, the 5-electrode method gave scores on the SSQ speech subscale 0.5 points lower than the standard method. Clinicians judged usability for all methods as acceptable, as did subjects for comfort. Analysis of stimulation levels and ECAP thresholds suggested that the 5-electrode method could be refined.Speech recognition was not inferior using either version of the electrophysiology-based software-guided fitting method compared with the standard method. Subject-reported speech perception was slightly inferior with the five-electrode method. Software-guided methods saved about 10 min of clinician's time versus standard fittings.

Published
2021
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3. A new research implementation of MP3ooo[TM] to improve intermediate pitch percept between electrode contacts.

Author

Neben, Nicole, Buechner, Andreas, Schuessler, Mark, Harpel, Theo, Lesinski-Schiedat, Anke, and Lenarz, Thomas

Abstract

A new research implementation of MP3[sup]000TM to improve intermediate pitch percept between electrode contacts has been developed. Several pitch ranking, melody recognition and speech understanding tests were conducted in order to identify the benefit of this research implementation named V-PACE. No significant benefit could be found for speech understanding and melody recognition. Pitch ranking was identified to be significantly better with V-PACE without influencing the speech understanding. [ABSTRACT FROM AUTHOR]

Published
2011

4. Hybrid-L and CI422 for treatment of partial deafness.

Author

Lesinski-Schiedat, Anke, Buechner, Andreas, Schuessler, Mark, and Lenarz, Thomas

Abstract

The Nucleus Hybrid-L and the Nucleus CI422 Cochlear Implant (CI) can be used for treatment of partial deafness due to the dimensions and features of both electrodes. The audiometric thresholds before and after surgery have been measured and indicate a hearing preservation with both electrodes, since the hearing preservation with Hybrid-L could be reached in 100% and with CI422 in 91% of the measurable cases. The Hybrid-L subjects can benefit from their acoustical hearing and gain a larger benefit with the combination of electrical and acoustical stimulation versus normal CI user with electrical only stimulation, because the CI users can't benefit from their former hearing experiences with their residual hearing. [ABSTRACT FROM AUTHOR]

Published
2011

5. A NEW RESEARCH IMPLEMENTATION OF MP3000TM TO IMPROVE INTERMEDIATE PITCH PERCEPT BETWEEN ELECTRODE CONTACTS.

Author

Neben, Nicole, Buechner, Andreas, Schuessler, Mark, Harpel, Theo, Lesinski-Schiedat, Anke, and Lenarz, Thomas

Subjects
SPEECH perception, MP3 (Audio coding standard), ABSOLUTE pitch, ELECTRODES, SPEECH processing systems, MELODY
Abstract

A new research implementation of MP3000TM to improve intermediate pitch percept between electrode contacts has been developed. Several pitch ranking, melody recognition and speech understanding tests were conducted in order to identify the benefit of this research implementation named V-PACE. No significant benefit could be found for speech understanding and melody recognition. Pitch ranking was identified to be significantly better with V-PACE without influencing the speech understanding. [ABSTRACT FROM AUTHOR]

Published
2011

7. Pre-processing for cochlear implant users in difficult listening environments.

Author

Neben, Nicole, Buechner, Andreas, Harpel, Theo, Schuessler, Mark, Lesinski-Schiedat, Anke, and Lenarz, Thomas

Abstract

Cochlear Nucleus products provide the option to program a CI sound processor with several pre-processing strategies, which aim to improve the speech understanding performance in noisy environments. The goal of this study was to evaluate the performance of different pre-processing strategies in difficult listening environments. Two different speaker setups for speech understanding tests in background noise and two different type of noise were used. The tested combination of different pre-processing algorithms in Nucleus® CP810 provides better performance in less modulated background noise and in more realistic environments. [ABSTRACT FROM AUTHOR]

Published
2011

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