Does amplitude compression help or hinder attentional neural speech tracking?

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Фев. 9, 2024

Abstract Amplitude compression is an indispensable feature of contemporary audio production and especially relevant in modern hearing aids. The cortical fate amplitude-compressed speech signals not well-studied, however, may yield undesired side effects: We hypothesize that compressing the amplitude envelope continuous reduces neural tracking. Yet, leveraging such a ‘compression effect’ on unwanted, distracting sounds could potentially support attentive listening if effectively reducing their In this study, we examined 24 young normal-hearing (NH) individuals, 19 older hearing-impaired (HI) 12 individuals. Participants were instructed to focus one two competing talkers while ignoring other. Envelope (1:8 ratio, loudness-matched) was applied or both streams containing short repeats. Electroencephalography (EEG) allowed us quantify response function degree With attended target stream, HI participants showed reduced behavioural accuracy, compressed yielded generally lowered metrics Importantly, found ignored stream resulted stronger representation uncompressed speech. Our results imply intelligent algorithms, with variable ratios separated sources, help individuals loss suppress distraction complex multi-talker environments. Significant statement compression, integral aids, poses underexplored challenge. Compressing hypothesized diminish capitalizing ’compression for might enhance listening. Studying (NH), (HI), normal dual-talker scenarios, streams. Both NH diminished tracking Despite weaker distractor, exhibited concurrent target. This suggests adaptive employing distinct aid suppressing distractions

Язык: Английский

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Neural attentional filters and behavioural outcome follow independent individual trajectories over the adult life span

Опубликована: Фев. 15, 2024

Preserved communication abilities promote healthy aging. To this end, the age-typical loss of sensory acuity might in part be compensated for by an individual’s preserved attentional neural filtering. Is such a compensatory brain–behaviour link longitudinally stable? Can it predict individual change listening behaviour? We here show that behaviour and filtering ability follow largely independent developmental trajectories modelling electroencephalographic behavioural data N = 105 aging individuals (39–82 yrs). First, despite expected decline hearing- threshold–derived acuity, listening-task performance proved stable over 2 years. Second, were correlated only within each separate measurement timepoint (T1, T2). Longitudinally, however, our results raise caution on attention-guided metrics as predictors behaviour: Neither at T1 nor its two-year could change, under combination strategies.

Язык: Английский

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Das Potenzial der frequenzspezifischen Neuromodulation für die Untersuchung und Verbesserung der Sprachverarbeitung im Gehirn

Zeitschrift für Neuropsychologie, Год журнала: 2024, Номер 35(1), С. 1 - 25

Опубликована: Фев. 23, 2024

Zusammenfassung: Das akustische Sprachsignal lässt sich nicht eindeutig in einzelne Wörter unterteilen und ähnelt eher einem kontinuierlichen Lautstrom. Dennoch gibt es zeitliche Regelmäßigkeiten, die möglicherweise bei der Wahrnehmung genutzt werden. Die Dauer von Sprachelementen wie Phonemen, Silben prosodischen Phrasen spiegelt Hirnaktivität Sprachwahrnehmung wider. Trotzdem ist klar, ob tatsächlich ein kausaler Zusammenhang zwischen neuronalen Antwort Qualität besteht. Der vorliegende Übersichtsartikel präsentiert einleitend relevanten Bestandteile des akustischen Sprachsignals, beschreibt neuronale auf Sprachreize im Gehirn zeigt auf, welche neurophysiologischen Veränderungen mit Sprachfunktionsstörungen einhergehen. Es werden verschiedene Verfahren nichtinvasiven Neuromodulation vorgestellt erste Ergebnisse präsentiert, darauf hindeuten, dass durch gezielte Sprachfunktionen verbessern lassen können.

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Neural attentional filters and behavioural outcome follow independent individual trajectories over the adult lifespan

eLife, Год журнала: 2024, Номер 12

Опубликована: Март 12, 2024

Preserved communication abilities promote healthy ageing. To this end, the age-typical loss of sensory acuity might in part be compensated for by an individual’s preserved attentional neural filtering. Is such a compensatory brain–behaviour link longitudinally stable? Can it predict individual change listening behaviour? We here show that behaviour and filtering ability follow largely independent developmental trajectories modelling electroencephalographic behavioural data N = 105 ageing individuals (39–82 y). First, despite expected decline hearing-threshold-derived acuity, listening-task performance proved stable over 2 y. Second, were correlated only within each separate measurement timepoint (T1, T2). Longitudinally, however, our results raise caution on attention-guided metrics as predictors behaviour: neither at T1 nor its 2-year could change, under combination strategies.

Язык: Английский

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Minimal background noise enhances neural speech tracking: Evidence of stochastic resonance

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Июнь 24, 2024

Neural activity in auditory cortex tracks the amplitude envelope of continuous speech, but recent work counter-intuitively suggests that neural tracking increases when speech is masked by background noise, despite reduced intelligibility. Noise-related amplification could indicate stochastic resonance - response facilitation through noise supports tracking. However, a comprehensive account sensitivity to and role cognitive investment lacking. In five electroencephalography (EEG) experiments (N=109; box sexes), current study demonstrates generalized enhancement due minimal noise. Results show a) enhanced for at very high SNRs (~30 dB SNR) where highly intelligible; b) this independent attention; c) it generalizes across different stationary maskers, strongest 12-talker babble; d) present headphone free-field listening, suggesting neural-tracking real-life listening. The paints clear picture enhances representation envelope, contributes further highlights non-linearities induced make its use as biological marker processing challenging.

Язык: Английский

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