01 May 2004
Med Sci Monit 2004; 10(5): CR218-222 :: ID: 11654
Background:Distortion product otoacoustic emissions (DPOAEs) is an objective, sensitive test of cochlear function. The aim of this study was the evaluation of noise-induced hearing loss in a group of industrial workers, using this method in conjunction with standard pure-tone audiometry (PTA).Material/Methods: Thirty-four subjects (68 ears) were included in the study. Standard PTA, tympanometry, and DPOAEs were performed. DPOAEs were recorded in the format of the DP-gram, using an ILO Otodynamics analyzer (ILO292 DP Echoport) connected to a portable personal computer. Results were analyzed and compared with the data of 30 normal persons of similar age and sex, examined at the same laboratory, using identical stimulation and recording conditions.Results: Most subjects had normal hearing thresholds for lower frequencies, but presented with a notched pattern in the 3000 to 6000 Hz region. The DPOAEs of the patients had reduced amplitudes compared with controls, or were even absent, in one or more frequencies. Across the frequency range of 1000 to 6000 Hz, a higher proportion of subjects showed abnormalities in DPOAEs than in the audiogram.Conclusions: From our data it may be concluded that cochlear dysfunction in noise-induced hearing loss may extend beyond the frequency region suggested by the audiogram, and that DPOAEs is a sensitive test of this damage.
Keywords: Auditory Threshold, Computers, Fourier Analysis, Hearing Loss, Noise-Induced - diagnosis, Hearing Loss, Noise-Induced - pathology, Hearing Tests, Noise, Occupational Exposure, Otoacoustic Emissions, Spontaneous, Auditory Threshold, Computers, Fourier Analysis, Hearing Loss, Noise-Induced - pathology, Hearing Tests, Noise, Occupational Exposure, Otoacoustic Emissions, Spontaneous
Most Viewed Current Articles
13 Apr 2020 : Original articleOutcome of 24 Weeks of Combined Schroth and Pilates Exercises on Cobb Angle, Angle of Trunk Rotation, Chest...
Med Sci Monit Basic Res 2020; 26:e920449
11 May 2020 : Original articleAnalysis of Psychological and Sleep Status and Exercise Rehabilitation of Front-Line Clinical Staff in the ...
Med Sci Monit Basic Res 2020; 26:e924085
05 Jan 2021 : Review articleA Southeast Asian Perspective on the COVID-19 Pandemic: Hemoglobin E (HbE)-Trait Confers Resistance Against...
Med Sci Monit Basic Res 2021; 27:e929207
10 Aug 2020 : Clinical ResearchEffects of Cognitive Task Training on Dynamic Balance and Gait of Patients with Stroke: A Preliminary Rando...
Med Sci Monit Basic Res 2020; 26:e925264