کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5739474 1615552 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isolating spectral cues in amplitude and quasi-frequency modulation discrimination by reducing stimulus duration
ترجمه فارسی عنوان
جدا کردن نشانه های طیفی در تبعیض مدولاسیون دامنه و شبه فرکانسی با کاهش طول مدت تحریک
کلمات کلیدی
مدولاسیون دامنه، محصولات تحریف شده، تن اصلاح کوبی، مدت زمان، حساسیت فاز، پهنای باند
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
چکیده انگلیسی
This study investigated the psychophysical effects of distortion products in a listening task traditionally used to estimate the bandwidth of phase sensitivity. For a 2000 Hz carrier, estimates of modulation depth necessary to discriminate amplitude modulated (AM) tones and quasi-frequency modulated (QFM) were measured in a two interval forced choice task as a function modulation frequency. Temporal modulation transfer functions were often non-monotonic at modulation frequencies above 300 Hz. This was likely to be due to a spectral cue arising from the interaction of auditory distortion products and the lower sideband of the stimulus complex. When the stimulus duration was decreased from 200 ms to 20 ms, thresholds for low-frequency modulators rose to near-chance levels, whereas thresholds in the region of non-monotonicities were less affected. The decrease in stimulus duration appears to hinder the listener's ability to use temporal cues in order to discriminate between AM and QFM, whereas spectral information derived from distortion product cues appears more resilient.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 348, May 2017, Pages 129-133
نویسندگان
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