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Effect of a processing delay between direct and delayed sound in simulated open fit hearing aids on speech intelligibility in noise

  • Introduction: Subjects with mild to moderate hearing loss today often receive hearing aids (HA) with open-fitting (OF). In OF, direct sound reaches the eardrums with minimal damping. Due to the required processing delay in digital HA, the amplified HA sound follows some milliseconds later. This process occurs in both ears symmetrically in bilateral HA provision and is likely to have no or minorIntroduction: Subjects with mild to moderate hearing loss today often receive hearing aids (HA) with open-fitting (OF). In OF, direct sound reaches the eardrums with minimal damping. Due to the required processing delay in digital HA, the amplified HA sound follows some milliseconds later. This process occurs in both ears symmetrically in bilateral HA provision and is likely to have no or minor detrimental effect on binaural hearing. However, the delayed and amplified sound are only present in one ear in cases of unilateral hearing loss provided with one HA. This processing alters interaural timing differences in the resulting ear signals. Methods: In the present study, an experiment with normal-hearing subjects to investigate speech intelligibility in noise with direct and delayed sound was performed to mimic unilateral and bilateral HA provision with OF. Results: The outcomes reveal that these delays affect speech reception thresholds (SRT) in the unilateral OF simulation when presenting speech and noise from different spatial directions. A significant decrease in the median SRT from –18.1 to –14.7 dB SNR is observed when typical HA processing delays are applied. On the other hand, SRT was independent of the delay between direct and delayed sound in the bilateral OF simulation. Discussion: The significant effect emphasizes the development of rapid processing algorithms for unilateral HA provision.show moreshow less

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Metadaten
Document Type:Article (reviewed)
Zitierlink: https://opus.hs-offenburg.de/8444
Bibliografische Angaben
Title (English):Effect of a processing delay between direct and delayed sound in simulated open fit hearing aids on speech intelligibility in noise
Author:Sebastian RothStaff MemberORCiDGND, Franz-Ullrich MüllerStaff MemberORCiDGND, Julian AngermeierStaff MemberORCiDGND, Werner HemmertORCiD, Stefan ZirnStaff MemberORCiDGND
Year of Publication:2023
Date of first Publication:2024/01/04
First Page:01
Last Page:12
Article Number:1257720
Parent Title (English):Frontiers in Neuroscience
Volume:17
ISSN:1662-453X
DOI:https://doi.org/10.3389/fnins.2023.1257720
Language:English
Inhaltliche Informationen
Institutes:Fakultät Elektrotechnik, Medizintechnik und Informatik (EMI) (ab 04/2019)
Forschung / POIM - Peter Osypka Institute of Medical Engineering
Institutes:Bibliografie
Tag:binaural hearing; open fitting; speech in noise; speech intelligibility model; unilateral hearing loss
Formale Angaben
Relevance:Wiss. Zeitschriftenartikel reviewed: Listung in Master Journal List
Open Access: Open Access 
 Gold 
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International