کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4356025 | 1615653 | 2008 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of occupational noise on pure-tone threshold and distortion product otoacoustic emissions after one workday
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کلمات کلیدی
PTSTTSMOCLDPAERSF1, F2OHCNIHLDPOAELNFSNRSPLLHTCASmedial olivocochlear - mediv olivocochlearnoise-induced hearing loss - افت شنوایی ناشی از سر و صداDistortion product otoacoustic emissions - انتشارات otoacoustic محصول تحریف شدهContralateral acoustic stimulation - تحریک آکوستیک متعاقب جانبیPermanent threshold shift - تغییر آستانه دائمیTemporary threshold shift - تغییر آستانه موقتOccupational noise - سر و صدا شغلیsensation level - سطح احساسhearing level - سطح شنواییSound pressure level - سطح فشار صوتouter hair cell - سلول بیرونی موMedial olivocochlear system - سیستم عصبی مرکزیNational Institute for Occupational Safety and Health - موسسه ملی ایمنی و بهداشت شغلیSignal-to-noise ratio - نسبت سیگنال به نویزNIOSH - نیوش
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
سیستم های حسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Impact of occupational noise on pure-tone threshold and distortion product otoacoustic emissions after one workday Impact of occupational noise on pure-tone threshold and distortion product otoacoustic emissions after one workday](/preview/png/4356025.png)
چکیده انگلیسی
The aim of this study was to investigate whether distortion product otoacoustic emissions (DPOAEs) are a suitable means for detecting small changes in cochlear amplifier functionality due to occupational noise exposure of one workday and whether efferent reflex strength of the medial olivocochlear bundle is able to predict the ear's susceptibility to noise. High-resolution (Îf2 = 47 Hz) DPOAEs were recorded between 3.5 and 4.5 kHz at close-to-threshold primary tone levels. For comparison, pure-tone audiometry was conducted. Efferent reflex strength was measured by means of DPOAEs at a specific frequency with and without contralateral acoustic stimulation. A statistically significant change was found for pure-tone thresholds (ÎLht = +1.6 ± 3.0 dB, n = 155) and DPOAE levels (ÎLdp = â1.0 ± 2.4 dB, n = 646; L2 = 20 dB SPL) in factory workers but not in office workers (ÎLht = â1.3 ± 3.3 dB, n = 80; ÎLdp = 0.0 ± 1.6 dB, n = 336) (control group). However, the influence of systematic biases due to, e.g. ear probe calibration or measurement sequence effects, has to be considered. Moreover, there was no significant correlation between efferent reflex strength and shifts in pure-tone thresholds or shifts in DPOAE levels. Thus, the applied measures of efferent reflex strength do not seem to be suitable for predicting temporary changes in hearing capability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 246, Issues 1â2, December 2008, Pages 9-22
Journal: Hearing Research - Volume 246, Issues 1â2, December 2008, Pages 9-22
نویسندگان
Jörg Müller, Thomas Janssen,