gms | German Medical Science

26. Jahrestagung der Deutschen Gesellschaft für Audiologie

Deutsche Gesellschaft für Audiologie e. V.

06.03. - 08.03.2024, Aalen

Speech recognition in complex listening situations of bimodal and single-sided-deaf cochlear implant users

Meeting Abstract

  • presenting/speaker Fabian Eberling - Hörzentrum Oldenburg gGmbH, Oldenburg, Germany; Cluster of Excellence “Hearing4All”, Oldenburg, Germany; Carl von Ossietzky Universität Oldenburg, Department für Medizinische Physik und Akustik, Oldenburg, Germany
  • Max Blümer - Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
  • Mark Praetorius - Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
  • Michael Schulte - Hörzentrum Oldenburg gGmbH, Oldenburg, Germany; Cluster of Excellence “Hearing4All”, Oldenburg, Germany
  • Jan Heeren - Hörzentrum Oldenburg gGmbH, Oldenburg, Germany; Cluster of Excellence “Hearing4All”, Oldenburg, Germany
  • Kirsten Wagener - Hörzentrum Oldenburg gGmbH, Oldenburg, Germany; Cluster of Excellence “Hearing4All”, Oldenburg, Germany
  • Thomas Brand - Cluster of Excellence “Hearing4All”, Oldenburg, Germany; Carl von Ossietzky Universität Oldenburg, Department für Medizinische Physik und Akustik, Oldenburg, Germany

Deutsche Gesellschaft für Audiologie e.V.. 26. Jahrestagung der Deutschen Gesellschaft für Audiologie. Aalen, 06.-08.03.2024. Düsseldorf: German Medical Science GMS Publishing House; 2024. Doc068

doi: 10.3205/24dga068, urn:nbn:de:0183-24dga0681

Published: March 5, 2024

© 2024 Eberling et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.


Outline

Text

Introduction: In pre- and postoperative cochlear implant (CI) evaluation, speech recognition (SR) is typically measured using monosyllabic words in quiet, which is applicable to prove general ability for SR. However, many aspects that patients are exposed to in everyday life are not taken into account, like diffuse background noises, turn-taking talkers, different voices or divided attention. The group of CI patients includes patients with normal hearing on the contralateral side (Single-Sided Deafness, SSD) as well as patients wearing a hearing aid on the contralateral side (Bimodal, BiM). This study investigated the differences between SSD and BiM patients for a complex multi-talker SR test paradigm, that has never been measured with CI patients before.

Methods: Eighteen adult cochlear implant users participated (8 SSD, 10 BiM). Monosyllabic word recognition in quiet was measured using the Freiburg Monosyllabic Test in free field conditions at 65 dB SPL with CI only. The adaptive CCOLSA [1] was used to measure the speech rate at which a subject reaches 50 percent correct responses for the CCOLSA dual task [2] presented 5 dB above the individual speech reception threshold (SRT) measured in diffuse noise. Furthermore, individual selective attention benefits were assessed using CCOLSA with fixed speech rates comparing Single- and DualTask conditions. CCOLSA was measured best aided.

Results: The monosyllabic word recognition of the two groups did not differ significantly. In contrast, SSD showed significantly lower SRT scores than BiM in diffuse noise (+0.2 dB compared to +3.6 dB median SRT) and reached significantly higher speech rates than BiM performing the adaptive CCOLSA. Furthermore, the SSD group showed a significant improvement of 30 percent points correct responses (median) in the single task (selective attention condition) compared to the dual task (divided attention condition), whereas BiM did not show a significant difference.

Conclusions: Performing the CCOLSA is feasible for both SSD and BiM patients. The results suggest that the hearing loss on the acoustically hearing ear of BiM patients leads to a retardation in cognitive processing of speech and a limitation of selective attention abilities.


References

1.
Heeren J, Hohmann V, Schulte M, Wagener K. Adaptive CCOLSA: Cognitive Overload Thresholds in a Multi-Talker Speech Test. Forum Acusticum; 2023 Sep; Torino, Italy.
2.
Heeren J, Nuesse T, Latzel M, Holube I, Hohmann V, Wagener KC, Schulte M. The Concurrent OLSA Test: A Method for Speech Recognition in Multi-talker Situations at Fixed SNR. Trends Hear. 2022 Jan-Dec;26:23312165221108257. DOI: 10.1177/23312165221108257 External link