کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4356383 1615675 2007 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temporal integration in the gerbil: The effects of age, hearing loss and temporally unmodulated and modulated speech-like masker noises
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
Temporal integration in the gerbil: The effects of age, hearing loss and temporally unmodulated and modulated speech-like masker noises
چکیده انگلیسی

We characterized temporal integration for 2 kHz pure tones with durations between 10 and 1000 ms in young, normal hearing old and old gerbils with a small hearing loss. Thresholds determined in silence increased for durations below 300 ms and were on average more than 10 dB higher for the 10 ms signal than asymptotic thresholds for the long signals. The amount of temporal integration tended to be less in gerbils with hearing loss. Threshold determination was repeated in the same individuals in the presence of speech-like unmodulated and modulated masking noises. Threshold shift due to the maskers was inversely related to the threshold in silence resulting in a reduced inter-individual variability of thresholds in both masking conditions. Thresholds differed systematically between both masker types in a duration dependent fashion. For long signal durations (300 and 1000 ms) thresholds were on average 2 dB lower and for the 10 ms signal 1.9 dB higher in the presence of the modulated masker. These differences in threshold obtained with the two maskers were significant. One hypothesis is that long signals can be detected in the troughs of the modulated masker, while peaks interfere with the detection of short signals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 224, Issues 1–2, February 2007, Pages 101–114
نویسندگان
, , , ,