Binaural Signal Processing in Hearing Aids

Derleth, Peter; Georganti, Eleftheria; Latzel, Matthias; Courtois, Gilles; Hofbauer, Markus; Raether, Juliane; Kuehnel, Volker

doi:10.1055/s-0041-1735176

Cited by 7 publications

(7 citation statements)

References 44 publications

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“…The SHL group exhibited significant changes in aided thresholds, K-HINT score, and K-HHIE score only when HAs were worn in both ears. These could be explained by the advantages of binaural hearing such as improvement in speech recognition in noisy conditions as well as sound localization [23].…”

Section: The Shl Groupmentioning

confidence: 99%

Factors Predicting Subjective Satisfaction for Successful Hearing Aid Adaptation

Jang,

Ha,

Choo

et al. 2024

JCM

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(1) Background: For successful hearing aid (HA) use during daily life, an objective parameter reflecting the subjective satisfaction is required. We explored the aided hearing status, hearing in noise test (HINT) scores, and subjective outcomes to predict performance improvements in everyday living. (2) Methods: A total of 406 patients with hearing loss (HL) who were prescribed HAs were included and were divided into two groups according to the symmetricity of HL. The relationship between audiometric data and subjective questionnaires under unaided and aided (3 months) conditions were investigated. (3) Results: Patients with symmetric HL showed a significant HINT signal-to-noise ratio (SNR) change and significant increase in their subjective satisfaction questionnaire score under the bilateral HA condition. On the other hand, the HINT SNR change and subjective questionnaire score showed various significances according to the side of HA (better or worse hearing) in asymmetric HL HINT SNR and was significantly correlated with the subjective questionnaire score in symmetric HL patients and AHL patients with unilateral HA in their better ear. (4) Conclusions: The HINT SNR improvement after long-term HA use could be an effective tool for predicting the subjective satisfaction of HA use and HA validation.

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Section: The Shl Groupmentioning

confidence: 99%

Factors Predicting Subjective Satisfaction for Successful Hearing Aid Adaptation

Jang,

Ha,

Choo

et al. 2024

JCM

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“…Listening with two ears (binaural hearing) compared to with only one ear (monaural hearing), has benefits that arise from several monaural and binaural cues that contribute to an improved ability to hear in noise [11,12].…”

Section: Natural Directivity and Hearing In Noisementioning

confidence: 99%

“…This diffraction of high-frequency sound results in more intense sound in the ear on the side of the head closest to the sound and an attenuation of sound going around the head to the other ear, with the latter being a phenomenon known as the "head shadow effect". This difference in intensity of sound between the two ears is called the interaural level difference (ILD) [12]. Cues for ITD are most efficient at frequencies 1500 Hz and below, while cues for ILD are most pronounced above 1500 Hz [13].…”

Section: Localization Via Binaural and Monaural Cuesmentioning

confidence: 99%

“…The cues upon which sound localization is based (i.e., ITDs, ILDs, and spectral shaping) also enable spatial hearing, which is the ability to localize and externalize sounds in terms of direction and distance. Spatial hearing provides a broader sense of the environment, thereby helping segregate sounds to choose what to focus on [2,11,12].…”

Section: Localization Via Binaural and Monaural Cuesmentioning

confidence: 99%

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Hearing Aid Directional Microphone Systems for Hearing in Noise

T. Jespersen

2023

Updates on Hearing Loss and Its Rehabilitation

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Sensorineural hearing loss is the most common type of permanent hearing loss. Most people with sensorineural hearing loss experience challenges with hearing in noisy situations, and this is the primary reason they seek help for their hearing loss. It also remains an area where hearing aid users often struggle. Directionality is the only hearing aid technology—in addition to amplification—proven to help hearing aid users hear better in noise. It amplifies sounds (sounds of interest) coming from one direction more than sounds (“noise”) coming from other directions, thereby providing a directional benefit. This book chapter describes the hearing-in-noise problem, natural directivity and hearing in noise, directional microphone systems, how directionality is quantified, and its benefits, limitations, and other clinical implications.

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“…Spencer et al [82] measured notably higher average JNDs of 68 ls in low-frequency ITDs with high interindividual variability in participants with symmetric hearing loss, which were not significantly different from those with normal hearing in their study. Phase distortions and corresponding ITD errors are likely to be expected when such thresholds are measured via bilateral HAs that are not synchronised (for reviews, see [83,84]). Poorest performance with JNDs of 150 ls and 100-350 ls has observed in bilateral cochlear-implant users [85] and bimodally-fitted listeners [86], respectively.…”

Section: Just-noticeable Differencesmentioning

confidence: 99%

Hybrid multi-harmonic model for the prediction of interaural time differences in individual behind-the-ear hearing-aid-related transfer functions

2022

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Spatial sound perception in aided listeners partly relies on hearing-aid-related transfer functions (HARTFs), describing the directional acoustic paths between a sound source and the hearing-aid (HA) microphones. Compared to head-related transfer functions (HRTFs), the HARTFs of behind-the-ear HAs exhibit substantial differences in spectro-temporal characteristics and binaural cues such as interaural time differences (ITDs). Since assumptions on antipodal microphone placement on the equator of a three-concentric sphere are violated in such datasets, predicting the ITDs via Kuhn’s simple analytic harmonic model entails excessive errors. Although angular ear-canal offsets have been addressed in an extended Woodworth model, the prediction errors remain large if the frequency range does not comply with the model specifications. Tuned to the previously inaccurately modelled frequency range between 500 Hz and 1.5 kHz, we propose a hybrid multi-harmonic model to predict the ITDs in HRTFs and HARTFs for arbitrary directions in the horizontal plane with superior accuracy. The target model coefficients are derived from individual directional measurements of 30 adults, wearing two dual-microphone behind-the-ear HAs and two in-ear microphones. Model individualisation is facilitated by the availability of polynomial weights that are applied to subsets of individual anthropometric and HA features to estimate the target model coefficients. The model is published as part of the Auditory Modeling Toolbox (AMT, pausch2022) and supplemented with the individual features and directional datasets.

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Binaural Signal Processing in Hearing Aids

Cited by 7 publications

References 44 publications

Factors Predicting Subjective Satisfaction for Successful Hearing Aid Adaptation

Factors Predicting Subjective Satisfaction for Successful Hearing Aid Adaptation

Hearing Aid Directional Microphone Systems for Hearing in Noise

Hybrid multi-harmonic model for the prediction of interaural time differences in individual behind-the-ear hearing-aid-related transfer functions

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