Distortion Product Otoacoustic Emissions as a Prognostic Factor for Idiopathic Sudden Sensorineural Hearing Loss

2006 ◽  
Vol 11 (5) ◽  
pp. 331-338 ◽  
Author(s):  
Ting-Kuang Chao ◽  
Tony Hsiu-Hsi Chen
Keyword(s):  
Hearing Loss ◽  
Prognostic Factor ◽  
Sensorineural Hearing Loss ◽  
Otoacoustic Emissions ◽  
Sudden Sensorineural Hearing Loss ◽  
Sensorineural Hearing ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product

Distortion Product Emissions in Normal-Hearing and Low-Frequency Hearing Loss Carriers of Genes for Waardenburg's Syndrome

1997 ◽  
Vol 106 (3) ◽  
pp. 220-225 ◽  
Author(s):  
Xue Zhong Liu ◽  
Valerie E. Newton
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Low Frequency ◽  
Normal Hearing ◽  
Distortion Product Otoacoustic Emissions ◽  
Control Group ◽  
Distortion Product ◽  
Initial Results

Eight patients with Waardenburg's syndrome (WS) with normal hearing and 3 additional patients exhibiting a low-frequency hearing loss were tested for the level of the acoustic distortion product 2f1-f2 by means of the Otodynamics Distortion Product Analyser (ILO92). Wide notches in distortion product otoacoustic emissions (DPOAEs) between 1,000 and 3,000 Hz were found in 7 (12 ears, 87.5%) examined patients with normal audiograms, which was a significantly higher rate than that found in the control group (10%). The 3 patients with low-frequency hearing loss gave a consistent pattern in audiometric configuration shown by both pure tone audiograms and DPOAEs. It is concluded from these initial results that DPOAEs may be a useful approach to identifying subclinical pathologic aberrations in the inner ear in WS patients, and may be a predictor of low-frequency sensorineural hearing loss.

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