Rethinking the clinical utility of distortion-product otoacoustic emission (DPOAE) signal-to-noise ratio

Portugal, Nicholas; Poling, Gayla L.; Dreisbach, Laura E.

doi:10.1080/14992027.2023.2215943

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…DPOAE amplitudes were used to test inner ear function, as this is the most sensitive method for measuring the function of the outer hair cells. [30] Otoacoustic emission was described by David Kemp. [31] Without damaging the outer hair cells, OAE levels are individual and unchanging.…”

Section: Discussionmentioning

confidence: 99%

Prevention of noise-induced hearing loss in children – recommendations for safe listening at events

Gáborján,

Koscsó,

Garai

et al. 2024

Preprint

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Purpose Events for children are often perceived to be too loud. Our study investigates the loudness of children’s events and its potential risk for noise-induced hearing loss. There are no specific regulations for recreational settings in many countries, including Hungary, therefore this research aims to provide a scientific basis for developing safety categories and noise level limits to protect children's hearing. Methods Thirteen events, including twelve specifically organized for children and one large festival with the participation of many children, were randomly selected for this study. Noise levels were measured at 25 points within the auditorium by acoustic engineers. The study involved children aged 3–12 years without any known hearing complaints or symptoms of disease. Otoacoustic emission measurements were performed on 38 children before and after the events to assess the impact on auditory function. Additionally, the subjective perception of loudness was surveyed through questionnaires completed by 51 children and their parents. Results Only seven out of 25 measurement points fell within the "safe" category. Ten places (40%) were categorized as "risky," and eight places (32%) as "dangerous." At risky conditions in some children a decrease in the inner ear function was detected after the event, which was significant at 4 and 5 kHz. High noise intensities were reported as uncomfortable or too loud by 80% of the children. Furthermore, the answers to the questionnaire highlighted that children were more sensitive to loudness than their parents. Age-related recommendations were made based on the analysis of results and the present knowledge of noise-induced adverse effects. Conclusions High noise intensity at children's events poses a significant risk for noise-induced hearing loss. Our findings highlight the need for monitoring and controlling sound levels at such events. We recommend implementing professional guidelines, public information, education, and warnings to prevent hearing loss in children. Based on the safety limit values of 75dB and 85dB and event duration, we developed a detailed proposal for regulation and information. Our study emphasizes that event organization and listening habits must be adjusted to protect children's hearing effectively.

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Section: Discussionmentioning

confidence: 99%

Prevention of noise-induced hearing loss in children – recommendations for safe listening at events

Gáborján,

Koscsó,

Garai

et al. 2024

Preprint

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Associations Between Noise Exposure Level, Noise Kurtosis, and Distortion Product Otoacoustic Emissions in Young Workers With Normal Hearing

Wei,

Zhao,

Gao

et al. 2024

Ear &Amp; Hearing

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Objectives: Growing evidence has suggested that, in addition to noise exposure level, noise temporal structure (i.e., kurtosis) plays an important role in the development of noise-induced hearing loss, while most of the relevant research has been on the results of pure-tone audiometry. This study focuses on the combined effect of noise exposure level and noise kurtosis on distortion product otoacoustic emissions (DPOAEs) in young workers with normal hearing. Design: A cross-sectional study among young workers in manufacturing industries was conducted in Zhejiang Province, China. Individual noise exposure measurements were performed on participants to obtain an A-weighted noise exposure level normalized to 8 hr (L Aeq, 8hr), cumulative noise exposure (CNE), kurtosis, and kurtosis-adjusted CNE (CNE-K). The DPOAE test was performed on the participants and DPOAE levels were obtained. The relationships between noise exposure level, kurtosis, and DPOAE levels were explored by univariate analyses. Furthermore, multivariate regression models were conducted to estimate the combined effects of exposure level and kurtosis after adjusting for age, gender, and use of hearing protection devices. Results: The overall DPOAE curves across frequency bands presented a fluctuating downward trend with increasing frequency. Both exposure level and kurtosis were found to be associated with decreases in DPOAE levels. The multivariate regression model including CNE-K as a joint indicator of complex noise showed an increased R 2 compared with the model including CNE. After adjustment for age, gender, and the use of hearing protection devices, significant effects of CNE-K on DPOAE levels were observed at 3, 4, and 5 kHz frequencies, with maximum effect presented at 4 kHz. Conclusions: DPOAE is a sensitive test that can detect cochlear damage in limited areas that cannot be detected by conventional audiometry. The present study provided a more comprehensive understanding of the impact of complex noise on the DPOAE levels. It also suggested that CNE-K was an effective metric in assessing DPOAE levels associated with complex noise.

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Rethinking the clinical utility of distortion-product otoacoustic emission (DPOAE) signal-to-noise ratio

Cited by 2 publications

References 33 publications

Prevention of noise-induced hearing loss in children – recommendations for safe listening at events

Prevention of noise-induced hearing loss in children – recommendations for safe listening at events

Associations Between Noise Exposure Level, Noise Kurtosis, and Distortion Product Otoacoustic Emissions in Young Workers With Normal Hearing

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