نتایج جستجو برای: Auditory Threshold

تعداد نتایج: 192586  

Journal: :international journal of occupational and environment medicine 0
sa moussavi-najarkola department of occupational health, school of medical sciences, tarbiat modares university, tehran a khavanin department. of occupational health, school of medical sciences, tarbiat modares university, tehran r mirzaei department of occupational health, health promotion research center, zahedan university of medical sciences, zahedan m salehnia department of anatomical sciences, school of medical sciences, tarbiat modares university, tehran a muhammadnejad cancer research center, iran cancer institute, tehran university of medical sciences, tehran m akbari department of audiology, school of rehabilitation, iran university of medical sciences, tehran

background: noise-induced hearing loss (nihl) is one of the most common occupational illnesses. most of the studies on nihl were conducted at high noise levels that people are rarely exposed to but in industries. the function of the outer hair cells (ohcs) is impaired after exposure to industrial noise. distortion product otoacoustic emissions (dpoaes) are useful in examination of noise-induced...

Journal: :iranian journal of otorhinolaryngology 0
mohammad reza vahidi otorhinolaryngology research center, shahid sadoughi university of medical sciences, yazd, iran. abolfazl mollasadeghi department of occupational medicine, shahid sadoughi university of medical sciences, yazd, iran. honeyeh shahbazian otorhinolaryngology research center, shahid sadoughi university of medical sciences, yazd, iran. nasim behniafard otorhinolaryngology research center, shahid sadoughi university of medical sciences, yazd, iran. mohammad hossein dadgarnia otorhinolaryngology research center, shahid sadoughi university of medical sciences, yazd, iran.

introduction: in order to achieve a higher success rate for tympanoplasty, different techniques have been developed, and a wide variety of grafting materials have been developed. one of the techniques currently receiving considerable attention involves not lifting the remaining of eardrum from the malleus and embedding the graft underneath in order to repair the eardrum correctly in its origina...

Journal: :auditory and vestibular research 0
vida rahimi department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, iran saeid farahani department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, iran shohreh jalaie biostatistics, school of rehabilitation, tehran university of medical sciences, tehran, iran atoosa saeidpour department of nutrition, school of nutrition and food technology, shahid beheshti university of medical sciences, tehran, iran

background and aim: omega 3 of essential fatty acids, especially in fish oil form plays an important role in structural, functional, and biological aspects in body. omega 3 deficiency can have devastating effects on the nervous system and auditory. this study aimed to evaluate auditory threshold in n-3 fatty acid-deficient rat pups following supplementation of fish oil consumption during the suc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - پژوهشکده برق و کامپیوتر 1391

این پایان نامه به دنبال ارائه روش هایی برای بهبودی سیگنال گفتار آلوده به نویز با رویکرد ارتقاء قابلیت فهم گفتار است. ماسک دودویی ایده ال (ibm) که هدف اصلی بحث آنالیز محاسباتی ترکیب شنیداری معرفی شده است، به عنوان ابزاری برای افزایش قابلیت فهم سیگنال گفتار مورد توجه قرار گرفته است. این ماسک در کنار توانایی که در افزایش قابلیت فهم دارد، مشکلاتی نیز همراه با آن وجود دارد. با توجه به تعریف ibm، که ...

Journal: :journal of research in rehabilitation sciences 0
محیا شریفی نیک سیما تاجیک قاسم محمدخانی شهره جلایی mahya sharifinik sima tajik

abstract   introduction: conductive hearing loss attenuates and delays sound transmission in the middle ear. it can make variety of central auditory processing disorders; that persists even after resolve of peripheral auditory system problems. one of the aspects of central auditory processing is the temporal processing, which is important for understanding speech, including temporal resolution,...

Journal: :iranian red crescent medical journal 0
reza hosseinabadi department of audiology, tehran university of medical sciences, tehran, ir iran sadegh jafarzadeh department of audiology, tehran university of medical sciences, tehran, ir iran; department of audiology, tehran university of medical sciences, tehran, ir iran. tel: +98-9125583372, fax: +98-2177534133

conclusions the assr can accurately predict the degree and configuration of hearing loss and discriminate the normal hearing from mild or moderate hearing loss and mild from moderate hearing loss, except for 500 hz. the air-conducted assr could not define the type of hearing loss. results the assr accurately estimates the behavioral thresholds as well as flat and sloping configurations. there w...

Journal: :acta medica iranica 0
shadman nemati department of otolaryngology- head and neck surgery, school of medicine, guilan university of medical sciences, guilan, iran. ali faghih habibi department of otolaryngology- head and neck surgery, school of medicine, guilan university of medical sciences, guilan, iran. rasool panahi department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran. masoomeh pastadast department of audiology, amiralmomenin hospital, guilan university of medical sciences, guilan, iran.

while most tinnitus cases have some degree of hearing impairment, a small percent of the patients admitted to ear, nose and throat clinics or hearing evaluation centers are those who complain of tinnitus despite having normal hearing thresholds. present study was performed in order to better understanding of the probable causes of tinnitus and to investigate possible changes in the cochlear and...

Journal: :acta medica iranica 0
akram pourbakht rehabilitation research center, school of rehabilitation, tehran university of medical sciences, tehran, iran. azadeh imani department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, iran.

we compared the extent of temporary threshold shift (tts) and hair cell loss following high level 4 khz noise exposure with those preconditioned with moderate level 1 and 4 khz octave band noise. fifteen male albino guinea pigs (300- 350 g in weight) were randomly allocated into three groups: those exposed to 4 khz octave band noise at 102 db spl (group 1, n=5); those conditioned with 1 khz oct...

Journal: :NIPPON SUISAN GAKKAISHI 1992

Journal: :auditory and vestibular research 0
fatemeh moghadasi boroujeni department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran masoumeh rouzbahani department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran fatemeh heidari department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran mohammad kamali department of basic sciences, school of rehabilitation sciences, iran university of medical sciences, tehran, iran

background and aim: human beings receive a variety of sounds in their everyday lives. these sounds are generated by different sources, and are heard simultaneously or with a small time sequence. a characteristic of the auditory system is its ability to analyze complex sounds, and to make decisions about the source of each constituent part of these sounds. the present study intends to assess nor...

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