نتایج جستجو برای: dpoae

تعداد نتایج: 421  

Journal: :The international tinnitus journal 2002
Attila L Nagy Ferenc Tóth Róbert Vajtai Zoltán Gingl József Jóri József Géza Kiss

Distortion product otoacoustic emission (DPOAE) is a widely used differential diagnostic method for diagnosing inner ear disorders. It provides us information on the condition of the outer hearing cells (OHCs). Otoacoustic emission occurs only when the OHCs are functioning normally. Changes in thresholds of DPOAE curves can provide us important information on the activity of the OHCs. The inner...

Journal: :Journal of neurophysiology 2009
Cornelius Abel Manfred Kössl

During auditory stimulation with several frequency components, distortion products (DPs) are generated as byproduct of nonlinear cochlear amplification. After generated, DP energy is reemitted into the ear channel where it can be measured as DP otoacoustic emission (DPOAE), and it also induces an excitatory response at cochlear places related to the DP frequencies. We measured responses of 91 i...

Journal: :Clinical and investigative medicine. Medecine clinique et experimentale 2009
Gürer G Budak Nuray Bayar Muluk Göknur Güler Oztürk Bilgehan Budak Alpaslan Apan Nesrin Seyhan Cihat Sanli

OBJECTIVES To determine the effects of 1800 MHz GSM-like Radiofrequency (RFR) on the cochlear functions of pregnant adult rabbits by Distortion Product Otoacoustic Emissions (DPOAEs). METHODS Eighteen 13-month-old pregnant and eighteen 13-month-old non-pregnant New Zealand White rabbits were studied. They were randomly divided into four groups. Nine pregnant rabbits (Group 2) and nine non-pre...

Journal: :The Journal of the Acoustical Society of America 2010
Carolina Abdala Sumitrajit Dhar

Apical distortion product otoacoustic emissions (DPOAEs) are comprised of at least two components, as evidenced by the interference pattern of alternating maxima and minima known as fine structure. DPOAE fine structure is produced by the shifting phase relationship in the ear canal, between the generator and characteristic frequency (CF) component of the response. Each component arises from a d...

2017
Amit Kumar Binod Kumar Sinha Dheeraj Kumar

Introduction: Communication is the essence of life. Speech, Language and Hearing are involved rigorously in any communication around us. Children Hearing loss in children constitutes a considerable handicap because it is an invisible disability & compromises optimal development & personnel achievement of a child. Screening is one of the most important methods for early diagnosis of hearing loss...

Journal: :Lin chuang er bi yan hou ke za zhi = Journal of clinical otorhinolaryngology 2004
Hongzheng Zhang Menghe Guo Yonghe Li

OBJECTIVE To investigate the characteristic of distortion product otoacoustic emissions (DPOAE) amplitude, SNR and noise in preterm newborns. METHOD DPAOEs at the 2f1-f2 frequency were recorded from 59 ears of 31 preterm newborns and 35 ears of 19 healthy fullterm newborns in response to equilevel primary tones at postnatal 3 days to 1 week. Detailed test included the recording of DPAOEs, SNR...

ژورنال: :مجله دانشگاه علوم پزشکی مازندران 0
مرتضی حمیدی نهرانی morteza hamidi nahrani علوم پزشکی مازندرانتهران: دانشگاه علوم بهزیستی و توانبخشی عطاء حیدری atta heidari علوم پزشکی مازندران مریم عمادی maryam emadi علوم پزشکی مازندران ایوب ولدبیگی ayub valadbeigi علوم پزشکی مازندران

سابقه و هدف: سلول های مویی خارجی مسئول تولید گسیل های صوتی گوش در پاسخ به تحریک آکوستیکی می باشند و این سلول ها اولین ساختاری هستندکه توسط سر و صدا با شدت بالا آسیب می بینند. بنابراین حتی تغییرات خفیف در سلول های مویی خارجی ممکن است تولید گسیل های صوتی گوش را تغییر دهد. هدف از تحقیق حاضر، بررسی و مقایسه نتایج ادیومتری تون خالص و دامنه پاسخ های(dpoae) distortion product oto acoustic emission در ...

2013
Mustafa Sagit Mehmet Akıf Somdas Ferhat Korkmaz Alper Akcadag

BACKGROUND Otomycosis is defined as an infection of the external ear canal with fungal agents. The treatment of the disease is cleansing and drying of the external ear canal, identification and treatment of any predisposing factors and application of topical antifungal agents. Terbinafine is used as an antifungal agent to treat otomycosis. We proposed to investigate the probable ototoxic effect...

Journal: :The Journal of the Acoustical Society of America 2002
Michael P Gorga Stephen T Neely Patricia A Dorn Dawn Konrad-Martin

Distortion product otoacoustic emission (DPOAE) levels in response to primary pairs (f2 = 2 or 4 kHz, L2 ranging from 20 to 60 dB SPL, L1 = 0.4L2 + 39 dB) were measured with and without suppressor tones (f3), which varied from 1 octave below to 1/2 octave above f2, in normal-hearing subjects. Suppressor level (L3) varied from -5 to 85 dB SPL. DPOAE levels were converted into decrements by subtr...

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