Effect of Stimulus Parameters, Age and Gender on Cubic Difference Distortion Product Otoacoustic Emission Measurement for Hearing Screening and Diagnosis

2008 ◽  
Author(s):  
V. P Jyothiraj ◽  
A Sukesh Kumar
Keyword(s):  
Otoacoustic Emission ◽  
Hearing Screening ◽  
Emission Measurement ◽  
Distortion Product Otoacoustic Emission ◽  
Age And Gender ◽  
Distortion Product ◽  
Stimulus Parameters ◽  
And Gender ◽  
Screening And Diagnosis

Evaluating the Function of the Medial Olivocochlear Bundle in Patients With Bilateral Tinnitus

2020 ◽  
Vol 63 (6) ◽  
pp. 1969-1978
Author(s):  
Lin-Hua Cheng ◽  
Chih-Hung Wang ◽  
Rou-Huei Lu ◽  
Yu-Fu Chen
Keyword(s):  
Otoacoustic Emission ◽  
Clinical Test ◽  
Emission Measurement ◽  
Distortion Product Otoacoustic Emission ◽  
Contralateral Noise ◽  
Distortion Product ◽  
Speech In Noise ◽  
Medial Olivocochlear ◽  
Test Outcomes ◽  
Medial Olivocochlear Bundle

Purpose No study has investigated the effects of contralateral noise (CN) on speech-in-noise perception (SINP) in listeners with tinnitus. The mechanisms underlying the involvement of medial olivocochlear (MOC) reflex with SINP remain to be elucidated. This study aimed to investigate the MOC function in patients with bilateral tinnitus by measuring distortion product otoacoustic emission and SINP. Method Eighteen patients with bilateral tinnitus (one male and 17 females; age: M ± SD = 45.61 ± 10.18 years) and 19 listeners without tinnitus (six males and 13 females; age: M ± SD = 34.11 ± 8.35 years) were recruited for the study. Each subject underwent distortion product otoacoustic emission measurement and the SINP test for both ears. The effects of CN on these two measurements were compared between tinnitus ears (TEs) and no-tinnitus ears (NTEs). Results The presence of CN significantly reduced distortion product (DP) amplitudes and improved SINP for TEs, and the amounts of DP suppression and SINP improvement were similar to those in NTEs. Improvement of SINP was positively correlated with DP suppression at 6185 Hz for NTEs and at 1640 Hz for TEs. Conclusions The results of this study suggest that the amounts of DP suppression and SINP improvement were similar between listeners with and without tinnitus. For both ear groups, the MOC reflex was involved with SINP at specific frequencies. Any clinical test outcomes with regard to the MOC bundle in patients with tinnitus should be interpreted with caution until further studies are conducted.

scholarly journals Universal hearing screening in newborns: experience in a tertiary care hospital of Mangalore, Karnataka, India

2019 ◽  
Vol 6 (3) ◽  
pp. 1063 ◽  
Author(s):  
Y. Bhanu Chandar Reddy ◽  
Sinchana Bhat ◽  
Roshan Ann Oommen ◽  
Santosh T. Soans
Keyword(s):  
Hearing Loss ◽  
Tertiary Care Hospital ◽  
Tertiary Care ◽  
Otoacoustic Emission ◽  
Hearing Screening ◽  
Health Concern ◽  
Care Hospital ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product ◽  
Universal Hearing Screening

Background: The aim of the study was to do universal hearing screening of all newborns using otoacoustic emission (OAE), to know the incidence and risk factors of hearing loss in neonates.Methods: This was a prospective observational study done in a tertiary care hospital in Mangalore city in Karnataka. 950 neonates were screened with distortion product otoacoustic emission (DPOAE) during the study period of one year from 2017 to 2018. A repeat test was done at one and a half months of age if the first test failed. Auditory brain stem evoked response (ABER) was performed at 3 months of age if both the tests failed. Babies with hearing loss were referred to ENT specialist for further management. Comparison of the variables was done by student’s t test and Chi-square test. P-value <0.05 was considered statistically significant.Results: Out of the 950 newborns screened with DPOAE test, 204 (21.4 %) babies had abnormal screen either in single or both ears. 7 out of 204 (3.43%) babies had abnormal OAE on repeat testing at one and half months. 2 out of 7 babies (0.96 %) had significant hearing loss ABER was performed at 3 months of age.Conclusions: Early identification by screening of hearing loss prevents a significant public health concern. Early recognition and intervention prior to 6 months have a significant positive impact on development.

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