scholarly journals Comparison of distortion product otoacoustic emissions and pure tone audiometry in occupational screening for auditory deficit due to noise exposure

2016 ◽  
Vol 130 (12) ◽  
pp. 1165-1165
Author(s):  
K Padmanabhan ◽  
D T Pulimoottil
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Pure Tone Audiometry ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product

Comparison of distortion product otoacoustic emissions and pure tone audiometry in occupational screening for auditory deficit due to noise exposure

2015 ◽  
Vol 129 (12) ◽  
pp. 1174-1181 ◽  
Author(s):  
N Wooles ◽  
M Mulheran ◽  
P Bray ◽  
M Brewster ◽  
A R Banerjee
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Outer Hair Cell ◽  
Cell Function ◽  
Pure Tone Audiometry ◽  
Otoacoustic Emission ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product

AbstractObjective:To examine whether distortion product otoacoustic emissions can serve as a replacement for pure tone audiometry in longitudinal screening for occupational noise exposure related auditory deficit.Methods:A retrospective review was conducted of pure tone audiometry and distortion product otoacoustic emission data obtained sequentially during mandatory screening of brickyard workers (n = 16). Individual pure tone audiometry thresholds were compared with distortion product otoacoustic emission amplitudes, and a correlation of these measurements was conducted.Results:Pure tone audiometry threshold elevation was identified in 13 out of 16 workers. When distortion product otoacoustic emission amplitudes were compared with pure tone audiometry thresholds at matched frequencies, no evidence of a robust relationship was apparent. Seven out of 16 workers had substantial distortion product otoacoustic emissions with elevated pure tone audiometry thresholds.Conclusion:No clinically relevant predictive relationship between distortion product otoacoustic emission amplitude and pure tone audiometry threshold was apparent. These results do not support the replacement of pure tone audiometry with distortion product otoacoustic emissions in screening. Distortion product otoacoustic emissions at frequencies associated with elevated pure tone audiometry thresholds are evidence of intact outer hair cell function, suggesting that sites distinct from these contribute to auditory deficit following ototrauma.

scholarly journals Subclinical Auditory Dysfunction: Relationship Between Distortion Product Otoacoustic Emissions and the Audiogram

2021 ◽  
pp. 1-16
Author(s):  
Naomi F. Bramhall ◽  
Garnett P. McMillan ◽  
Amy N. Mashburn
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Outer Hair Cell ◽  
Self Report ◽  
Distortion Product Otoacoustic Emissions ◽  
Sample Mean ◽  
Distortion Product ◽  
Clinically Normal ◽  
Auditory Physiology

Purpose Distortion product otoacoustic emissions (DPOAEs) and audiometric thresholds have been used to account for the impacts of subclinical outer hair cell (OHC) dysfunction on auditory perception and measures of auditory physiology. However, the relationship between DPOAEs and the audiogram is unclear. This study investigated this relationship by determining how well DPOAE levels can predict the audiogram among individuals with clinically normal hearing. Additionally, the impacts of age, noise exposure, and the perception of tinnitus on the ability of DPOAE levels to predict the audiogram were evaluated. Method Suprathreshold DPOAE levels from 1 to 10 kHz and pure-tone thresholds from 0.25 to 16 kHz were measured in 366 ears from 194 young adults (19–35 years old) with clinically normal audiograms and middle ear function. The measured DPOAE levels at all frequencies were used to predict pure-tone thresholds at each frequency. Participants were grouped by age, self-reported noise exposure/Veteran status, and self-report of tinnitus. Results Including DPOAE levels in the pure-tone threshold prediction model improved threshold predictions at all frequencies from 0.25 to 16 kHz compared with a model based only on sample mean pure-tone thresholds, but these improvements were modest. DPOAE levels for f 2 frequencies of 4 and 5 kHz were particularly influential in predicting pure-tone thresholds above 4 kHz. However, prediction accuracy varied based on participant characteristics. On average, predicted pure-tone thresholds were better than measured thresholds among Veterans, individuals with tinnitus, and the oldest age group. Conclusions These results indicate a complex relationship between DPOAE levels and the audiogram. Underestimation of pure-tone thresholds for some groups suggests that additional factors other than OHC damage may impact thresholds among individuals within these categories. These findings suggest that DPOAE levels and pure-tone thresholds may differ in terms of how well they reflect subclinical OHC dysfunction. Supplemental Material https://doi.org/10.23641/asha.13564745

scholarly journals Subclinical auditory dysfunction: Relationship between distortion product otoacoustic emissions and the audiogram

2020 ◽  
Author(s):  
Naomi Bramhall ◽  
Garnett McMillan ◽  
Amy Mashburn
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Distortion Product Otoacoustic Emissions ◽  
Age Group ◽  
Distortion Product ◽  
Pure Tone Audiogram ◽  
Clinically Normal ◽  
Veteran Status ◽  
Exposure History

Purpose: Both distortion product otoacoustic emissions (DPOAEs) and pure tone thresholds have been used to account for the impacts of subclinical outer hair cell (OHC) dysfunction on auditory perception and measures of auditory physiology. However, the relationship between DPOAEs and the audiogram is unclear. This study investigated this relationship by determining how well DPOAE levels can predict the pure tone audiogram among individuals with clinically normal hearing. Additionally, the impacts of age, noise exposure history, and the perception of tinnitus on the ability of DPOAE levels to predict the audiogram were evaluated.Method: Suprathreshold DPOAE levels from 1-10 kHz and pure tone thresholds from 0.25-16 kHz were measured in 366 ears from 194 young adults (19-35 years) with clinically normal audiograms (thresholds ≤ 20 dB HL from 0.25-8 kHz) and normal middle ear function. The measured DPOAE levels at all frequencies were used to predict each pure tone frequency. Participants were grouped based on age, self-reported noise exposure history/Veteran status, and self-report of tinnitus.Results: Inclusion of DPOAE levels in the pure tone threshold prediction model improved threshold predictions at all frequencies from 0.25-16 kHz compared with a model based only on sample mean pure tone thresholds, but these improvements were modest (0.4 to 2.1 dB). DPOAE levels for f2 frequencies of 4 and 5 kHz were particularly influential in predicting pure tone thresholds above 4 kHz. However, the prediction accuracy of the model varied based on participant characteristics. On average, predicted pure tone thresholds were better than measured thresholds among Veterans, individuals with tinnitus, and the oldest age group (31-35 years). In contrast, predicted thresholds tended to be poorer than measured thresholds among the youngest age group (19-25 years) and non-Veterans.Conclusions: These results indicate a complex relationship between DPOAE levels and the pure tone audiogram. Underestimation of pure tone thresholds related to Veteran status, perception of tinnitus, and older age suggests that additional factors other than OHC damage may impact pure tone thresholds among individuals within these categories. These findings suggest that DPOAE levels and pure tone thresholds may differ in terms of how well they reflect subclinical OHC dysfunction.

ROLE OF AUDIOLOGICAL SCREENING (PURE TONE AUDIOMETRY AND DISTORTION PRODUCT OTOACOUSTIC EMISSIONS) IN PATIENTS UNDERGOING CONCURRENT CHEMORADIATION FOR HEAD AND NECK CANCERS

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Anisha Kocchar ◽  
Rohit Sharma ◽  
Piyush Kumar ◽  
Vineet Sharma ◽  
Kumar Shubhanshu
Keyword(s):  
Head And Neck ◽  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Pure Tone Audiometry ◽  
Head And Neck Cancers ◽  
Concurrent Chemoradiation ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product ◽  
Pre Treatment

<bold>Introduction:</bold> Chemoradiation is an important component in the management of Head and Neck Cancers, which has hearing loss as a major adverse effect. This is due to the inclusion of ear structures in the radiation field and Cisplatin, an anti-neoplastic drug which can cause ototoxicity. The role of audiological screening in the form of Pure Tone Audiometry & Distortion Product Otoacoustic Emissions is hereby studied in these patients. <bold>Material and Methods:</bold> The present study was undertaken to highlight the effects of concurrent chemoradiation on the audiological profile of Head and Neck Cancer patients. The patients underwent pre-treatment and post treatment Pure Tone Audiometry and Distortion Product Otoacoustic Emission. The results were statistically analysed. <bold>Results:</bold> 36 patients who underwent concurrent chemoradiation for Head and Neck Cancers were enrolled. Post treatment PTA values were significantly different from Pre-treatment values especially at 500Hz. DPOAEs also indicated significant changes in cochleotoxicity grading after concurrent chemoradiation. <bold>Conclusion:</bold> Concurrent Chemoradiation exerts a significant effect on hearing status of the patients. Simple screening tests like DPOAE can detect cochlear damage prior to detection with Pure Tone Audiometry. Addition of these tests is recommended as routine screening during Concurrent Chemoradiation.

scholarly journals Comparison of Saccular Function in Nonmusicians and Violinists Using cVEMP: A Pilot Study

2021 ◽  
Author(s):  
Eva Eadle D’Souza ◽  
Krishna Yerraguntla
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Pure Tone Audiometry ◽  
Vestibular Evoked Myogenic Potential ◽  
Professional Musicians ◽  
Distortion Product ◽  
Significant Comparison ◽  
Mean Differences ◽  
The Right

Abstract Introduction Human auditory and vestibular systems change due to noise exposure. Professional musicians are often subjected to loud music and longer durations as part of their practice. Although the effects of music have been explored extensively on the auditory system, it is important to understand changes in the vestibular system also. The current study is aimed to compare cervical vestibular evoked myogenic potential (cVEMP) findings in nonmusicians and violinists to understand if there are any changes in the P1 and N1 latencies and absolute amplitudes in the violinists’ groups because of their exposure to violin music. Materials and Methods Twelve participants (6 nonmusicians and 6 violinists) of both genders were included in the study. Pure tone audiometry and distortion product otoacoustic emissions (DPOAEs) were performed on all the participants. cVEMP P1 and N1 latencies and absolute amplitudes were obtained, and overall mean differences were compared within and between groups. Results Pure tone average and DPOAE were within the normal range between and within the groups. Results indicate that P1 and N1 absolute amplitudes and latencies were slightly prolonged in the violinists’ group; however, the mean difference was not statistically significant. Comparison of mean absolute amplitudes and latencies between the ears in the violinists’ group showed longer latencies and greater absolute amplitudes in the left ear of violinists as compared with the right ear. In the study, the violinists’ group consisted of participants who had an average daily exposure of about one-and-a-half hours and had an experience of playing the instrument for more than 5 years. Conclusion cVEMP is useful in detecting early changes in the saccule that may occur due to noise exposure. It can be concluded that, even before a clinically detectable hearing loss or vestibular damage, changes in saccule are observed with the help of cVEMP and should be included in the audiovestibular test for early identification.

scholarly journals Pure-Tone Hearing Thresholds and Otoacoustic Emissions in Students of Music Academies

2021 ◽  
Vol 18 (3) ◽  
pp. 1313
Author(s):  
Małgorzata Pawlaczyk-Łuszczyńska ◽  
Małgorzata Zamojska-Daniszewska ◽  
Adam Dudarewicz ◽  
Kamil Zaborowski
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Signal To Noise Ratio ◽  
Pure Tone Audiometry ◽  
Music Students ◽  
Control Group ◽  
Exposure Level ◽  
Distortion Product ◽  
Hearing Thresholds

The objective of this study was to assess the hearing of music students in relation to their exposure to excessive sounds. A standard pure-tone audiometry, transient-evoked otoacoustic emissions (TEOAEs) and distortion-product otoacoustic emissions (DPOAEs) were determined in 163 students of music academies, aged 22.8 ± 2.6 years. A questionnaire survey and sound pressure level measurements during solo and group playing were also conducted. The control group comprised 67 subjects, mainly non-music students, aged 22.8 ± 3.3 years. Study subjects were exposed to sounds at the A-weighted weekly noise exposure level (LEX,w) from 75 to 106 dB. There were no significant differences in the hearing thresholds between groups in the frequency range of 4000–8000 Hz. However, music students compared to control group exhibited lower values of DPOAE amplitude (at 6000 and 7984 Hz) and signal-to-noise ratio (SNR) (at 984, 6000, and 7984 Hz) as well as SNR of TEOAE (in 1000 Hz band). A significant impact of noise exposure level, type of instrument, and gender on some parameters of measured otoacoustic emissions was observed. In particular, music students having LEX,w ≥ 84.9 dB, compared to those with LEX,w < 84.9 dB, achieved significantly lower DPOAE amplitude at 3984 Hz. Meanwhile, both TEOAE and DPOAE results indicated worse hearing in students playing percussion instruments vs. wind instruments, and wind instrument players vs. students playing stringed instruments.

Evaluation of Efferent Auditory System and Hearing Quality in Parkinson's Disease: Is the Difficulty in Speech Understanding in Complex Listening Conditions Related to Neural Degeneration or Aging?

2020 ◽  
pp. 1-9
Author(s):  
Nuriye Yıldırım Gökay ◽  
Bülent Gündüz ◽  
Fatih Söke ◽  
Recep Karamert
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Auditory System ◽  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Pure Tone Audiometry ◽  
Auditory Pathway ◽  
Normal Hearing ◽  
System Function ◽  
Distortion Product

Purpose The effects of neurological diseases on the auditory system have been a notable issue for investigators because the auditory pathway is closely associated with neural systems. The purposes of this study are to evaluate the efferent auditory system function and hearing quality in Parkinson's disease (PD) and to compare the findings with age-matched individuals without PD to present a perspective on aging. Method The study included 35 individuals with PD (mean age of 48.50 ± 8.00 years) and 35 normal-hearing peers (mean age of 49 ± 10 years). The following tests were administered for all participants: the first section of the Speech, Spatial and Qualities of Hearing Scale; pure-tone audiometry, speech audiometry, tympanometry, and acoustic reflexes; and distortion product otoacoustic emissions (DPOAEs) and contralateral suppression of DPOAEs. SPSS Version 25 was used for statistical analyses, and values of p < .05 were considered statistically significant. Results There were no statistically significant differences in the pure-tone audiometry thresholds and DPOAE responses between the individuals with PD and their normal-hearing peers ( p = .732). However, statistically significant differences were found between the groups in suppression levels of DPOAEs and hearing quality ( p < .05). In addition, a statistically significant and positive correlation was found between the amount of suppression at some frequencies and the Speech, Spatial and Qualities of Hearing Scale scores. Conclusions This study indicates that medial olivocochlear efferent system function and the hearing quality of individuals with PD were affected adversely due to the results of PD pathophysiology on the hearing system. For optimal intervention and follow-up, tasks related to hearing quality in daily life can also be added to therapies for PD.

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