کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6286934 1615561 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research paperNeural indices of phonemic discrimination and sentence-level speech intelligibility in quiet and noise: A mismatch negativity study
ترجمه فارسی عنوان
شاخص های عصبی از تبعیض واج شناختی و قابلیت تشخیص گفتار در حالت سخنرانی در حالت آرام و سر و صدا: مطالعه منفی ناسازگاری
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
چکیده انگلیسی


- Noise differentially impacts cortical processing of consonant and vowel stimuli.
- Noise-induced changes in MMN are reflected in theta band power.
- Segmental MMN measures are able to predict sentence-level intelligibility.

Successful speech communication requires the extraction of important acoustic cues from irrelevant background noise. In order to better understand this process, this study examined the effects of background noise on mismatch negativity (MMN) latency, amplitude, and spectral power measures as well as behavioral speech intelligibility tasks. Auditory event-related potentials (AERPs) were obtained from 15 normal-hearing participants to determine whether pre-attentive MMN measures recorded in response to a consonant (from /ba/ to /bu/) and vowel change (from /ba/ to /da/) in a double-oddball paradigm can predict sentence-level speech perception. The results showed that background noise increased MMN latencies and decreased MMN amplitudes with a reduction in the theta frequency band power. Differential noise-induced effects were observed for the pre-attentive processing of consonant and vowel changes due to different degrees of signal degradation by noise. Linear mixed-effects models further revealed significant correlations between the MMN measures and speech intelligibility scores across conditions and stimuli. These results confirm the utility of MMN as an objective neural marker for understanding noise-induced variations as well as individual differences in speech perception, which has important implications for potential clinical applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 339, September 2016, Pages 40-49
نویسندگان
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