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Lin IF, Tsai PJ, Wu JL, Chin WS, Lin CY, Guo YL. The effect of cumulative noise exposure on distortion product otoacoustic emissions. Int J Audiol 2023; 62:886-892. [PMID: 35968641 DOI: 10.1080/14992027.2022.2106450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/12/2022] [Accepted: 07/21/2022] [Indexed: 11/05/2022]
Abstract
OBJECTIVE This study aimed to identify the characteristics of distortion product otoacoustic emissions (DPOAEs) that can be used to differentiate noise-induced hearing loss (NIHL) from age-related hearing loss. A potential index to detect NIHL was defined in terms of its susceptibility to cumulative noise exposure but not to age. DESIGN In this cross-sectional cohort study, a job-exposure matrix was used to calculate the cumulative noise exposure. Multivariate linear regression models were used to examine how age and cumulative noise exposure associated with DPOAEs at individual frequencies after adjusting for hypertension, dyslipidaemia, tobacco use and alcohol consumption. STUDY SAMPLE The pure-tone audiometry and DPOAEs data collected from 239 male workers in a steel factory. RESULTS DPOAEs and DPOAE signal-to-noise ratios (SNRs) at all frequencies were found to be correlated with age, and those at 2, 3, 4 and 6 kHz were correlated with both age and noise exposure. The difference between DPOAE SNR at 1 and 3 kHz showed significant correlation with noise exposure but not with age. CONCLUSIONS The results showed that this DPOAE index, the DPOAE SNR at 1 kHz minus the DPOAE SNR at 3 kHz, could add values to audiometric evaluation of NIHL.
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Affiliation(s)
- I-Fan Lin
- Department of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Occupational Medicine, Shuang Ho Hospital, New Taipei City, Taiwan
| | - Perng-Jy Tsai
- Department of Environment and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jiunn-Liang Wu
- Department of Otolaryngology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Shan Chin
- Department of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
- School of Nursing, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Cheng-Yu Lin
- Department of Otolaryngology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yue Leon Guo
- Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, Taipei, Taiwan
- Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Taipei, Taiwan
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Sonstrom Malowski K, Gollihugh LH, Malyuk H, Le Prell CG. Auditory changes following firearm noise exposure, a review. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2022; 151:1769. [PMID: 35364940 DOI: 10.1121/10.0009675] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Firearms produce peak sound pressure levels (peak SPL) between ∼130 and 175 dB peak SPL, creating significant risk of noise-induced hearing loss (NIHL) in those exposed to firearm noise during occupational, recreational, and/or military operations. Noise-induced tinnitus and hearing loss are common in military service members, public safety officers, and hunters/shooters. Given the significant risk of NIHL due to firearm and other noise sources, there is an interest in, and demand for, interventions to prevent and/or treat NIHL in high-risk populations. However, research and clinical trial designs assessing NIHL prevention have varied due to inconsistent data from the literature, specifically with end point definitions, study protocols, and assessment methodologies. This article presents a scoping review of the literature pertaining to auditory changes following firearm noise exposure. Meta-analysis was not possible due to heterogeneity of the study designs. Recommendations regarding audiologic test approach and monitoring of populations at risk for NIHL are presented based on critical review of the existing literature.
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Affiliation(s)
| | - Lindsay H Gollihugh
- School of Speech-Language Pathology and Audiology, The University of Akron, Akron, Ohio 44325, USA
| | - Heather Malyuk
- School of Speech-Language Pathology and Audiology, The University of Akron, Akron, Ohio 44325, USA
| | - Colleen G Le Prell
- Department of Speech, Language, and Hearing, The University of Texas at Dallas, Richardson, Texas 75080, USA
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Aremu SK, Adewoye RK, Adeyanju AT, Ekpo DS. Prevalence, Awareness, and Factors Associated with Noise-induced Hearing Loss in Occupational Motorcyclists in Southwestern Nigeria. Niger J Surg 2020; 26:53-58. [PMID: 32165837 PMCID: PMC7041349 DOI: 10.4103/njs.njs_26_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 08/29/2019] [Accepted: 09/16/2019] [Indexed: 11/04/2022] Open
Abstract
Background There is generally a lack of awareness among professional motorcycle riders on the risk of noise-induced hearing loss; due to a variety of factors, they are exposed to by the nature of their job. This study, therefore, aimed to determine the prevalence, awareness, and factors associated with noise-induced hearing loss among motorcycle riders in Ido-Ekiti, Ekiti State, Nigeria. Methodology A cross-sectional descriptive study was conducted between February and March 2019 among 420 motorcycle riders in Ido-Ekiti, Ekiti State, Southwestern Nigeria. Data analyses were performed using the SPSS software version 20. P ≤ 0.05 was considered as statistically significant. Three hundred and sixty of the total of 420 consented for pure-tone audiometry which was done to assess their hearing thresholds. Results Majority of the respondents had at least a secondary level of education. About 14.5% of the total study population had hearing loss, among which 15% also reported an accompanying ear discharge. All of the respondents did not have any history of hearing loss before they started the occupation. More than half of the study population was aware of noise-induced hearing loss and was able to link it to their profession. None of the study participants used a hearing aid, but 17.9% reported using ear mufflers and 16.2% used earphones while riding. Conclusion Majority of our respondents had secondary school education and 14.5% of the total study population reported hearing loss, among which 15% also reported an accompanying ear discharge. Furthermore, more than half of the study population was aware of noise-induced hearing loss and was able to link it to their profession, whereas 50% agreed that their occupation placed them at risk of hearing loss.
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Affiliation(s)
- Shuaib Kayode Aremu
- Department of Ear, Nose and Throat, Federal Teaching Hospital Ido-Ekiti/Afe Babalola University, Ado-Ekiti, Ekiti State, Nigeria
| | - Rasaq Kayode Adewoye
- Department of Community Medicine Federal Teaching Hospital, Ido Ekiti/Afe Babalola University, Ado-Ekiti, Ekiti State, Nigeria
| | - Alao Taiye Adeyanju
- Department of Community Medicine Federal Teaching Hospital, Ido Ekiti, Ekiti State, Nigeria
| | - David Sylvanus Ekpo
- Department of Community Medicine Federal Teaching Hospital, Ido Ekiti, Ekiti State, Nigeria
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Abstract
Objective: The objective of this study was to assess and compare the hearing of police K9 handlers and non-K9 handlers.Design: Cross-sectional design.Study sample: Hearing was assessed on 30 police officers, 12 K9 handlers and 18 non-K9 handlers, from Northeast Ohio.Results: There were no significant differences in audiologic test results between police K9 handlers and non-K9 handlers. Audiometric results revealed that 66.7% of K9 handlers and 83.3% of non-K9 handlers presented with hearing loss. Noise notches, consistent with noise-induced hearing loss (NIHL), and asymmetric hearing losses were observed for both groups. Subjective questionnaires indicated low awareness regarding the risks and identification of NIHL in this population.Conclusions: This study represents one of the few studies that focus on hearing assessments in police K9 handlers and non-K9 handlers in the United States and internationally. Significant differences between these two groups were not found, suggesting that K9 handlers do not present a higher risk for NIHL than non-K9 handlers. Nonetheless, the high prevalence of hearing loss identified for both groups in this study suggests the need for increased conservation efforts to raise awareness regarding hearing loss prevention and the need for routine audiologic monitoring for this underserved population.
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Affiliation(s)
| | - James Steiger
- School of Speech-Language Pathology and Audiology, The University of Akron, Akron, OH, USA
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Nassiri P, Zare S, Monazzam MR, Pourbakht A, Azam K, Golmohammadi T. Evaluation of the effects of various sound pressure levels on the level of serum aldosterone concentration in rats. Noise Health 2019; 19:200-206. [PMID: 28816207 PMCID: PMC5594925 DOI: 10.4103/nah.nah_64_16] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Introduction: Noise exposure may have anatomical, nonauditory, and auditory influences. Considering nonauditory impacts, noise exposure can cause alterations in the automatic nervous system, including increased pulse rates, heightened blood pressure, and abnormal secretion of hormones. The present study aimed at examining the effect of various sound pressure levels (SPLs) on the serum aldosterone level among rats. Materials and Methods: A total of 45 adult male rats with an age range of 3 to 4 months and a weight of 200 ± 50 g were randomly divided into 15 groups of three. Three groups were considered as the control groups and the rest (i.e., 12 groups) as the case groups. Rats of the case groups were exposed to SPLs of 85, 95, and 105 dBA. White noise was used as the noise to which the rats were exposed. To measure the level of rats’ serum aldosterone, 3 mL of each rat’s sample blood was directly taken from the heart of anesthetized animals by using syringes. The taken blood samples were put in labeled test tubes that contained anticoagulant Ethylenediaminetetraacetic acid. In the laboratory, the level of aldosterone was assessed through Enzyme-linked immunosorbent assay protocol. The collected data were analyzed by the use of Statistical Package for Social Sciences (SPSS) version 18. Results: The results revealed that there was no significant change in the level of rats’ serum aldosterone as a result of exposure to SPLs of 65, 85, and 95 dBA. However, the level of serum aldosterone experienced a remarkable increase after exposure to the SPL of 105 dBA (P < 0.001). Thus, the SPL had a significant impact on the serum aldosterone level (P < 0.001). In contrast, the exposure time and the level of potassium in the used water did not have any measurable influence on the level of serum aldosterone (P = 0.25 and 0.39). Conclusion: The findings of this study demonstrated that serum aldosterone can be used as a biomarker in the face of sound exposure.
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Affiliation(s)
- Parvin Nassiri
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Sajad Zare
- Department of Occupational Health, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad R Monazzam
- Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Akram Pourbakht
- Department of Audiology, School of Rehabilitation, University of Medical Sciences, Tehran, Iran
| | - Kamal Azam
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Taghi Golmohammadi
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Clifford RE, Rogers RA. Impulse Noise: Theoretical Solutions to the Quandary of Cochlear Protection. Ann Otol Rhinol Laryngol 2017; 118:417-27. [DOI: 10.1177/000348940911800604] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Workers in industries with impact noise, as well as soldiers exposed to supersonic blasts from armament and explosive devices, appear to be more at risk for hearing loss than are their counterparts exposed to continuous noise. Alternative considerations for hearing protection are dictated because of a disproportionately increased biophysical response in comparison to continuous noise. Impulse noise is a significant and distinct problem that requires a new strategy for hearing protection. A review of current clinical and occupational literature suggests that impulse noise may be more damaging than continuous sound. Statistical measurements such as kurtosis hold promise for the quantitative prediction of hearing loss. As sound energy to the cell increases, the mechanism of cochlear damage shifts from biochemical injury to mechanical injury. Outer hair cells appear to be more sensitive than inner hair cells to impulse noise because of their energy requirements, which lead to increased production of reactive oxygen and nitrogen species and self-destruction by apoptosis. Hearing protective devices currently in use for impulse noise include hunters' hearing devices, active noise-reduction headsets, and various in-ear plugs, including nonlinear reacting inserts. Existing equipment is hampered by the materials used and by present-day electronic technology. Antioxidants administered before sound exposure show promise in mitigating hearing loss in industrial and combat situations. New materials with improved damping, reflective, and absorption characteristics are required. Hearing protective devices that allow passage of ambient sound while blocking harmful noise might improve the compliance and safety of those exposed. Sensing devices that instantaneously and selectively hyperpolarize outer hair cells are discussed as alternate protection.
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Affiliation(s)
- Royce E. Clifford
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
| | - Rick A. Rogers
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
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Spankovich C, Griffiths SK, Lobariñas E, Morgenstein KE, de la Calle S, Ledon V, Guercio D, Le Prell CG. Temporary threshold shift after impulse-noise during video game play: laboratory data. Int J Audiol 2014; 53 Suppl 2:S53-65. [PMID: 24564694 DOI: 10.3109/14992027.2013.865844] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Prevention of temporary threshold shift (TTS) after laboratory-based exposure to pure-tones, broadband noise, and narrowband noise signals has been achieved, but prevention of TTS under these experimental conditions may not accurately reflect protection against hearing loss following impulse noise. This study used a controlled laboratory-based TTS paradigm that incorporated impulsive stimuli into the exposure protocol; development of this model could provide a novel platform for assessing proposed therapeutics. DESIGN Participants played a video game that delivered gunfire-like sound through headphones as part of a target practice game. Effects were measured using audiometric threshold evaluations and distortion product otoacoustic emissions (DPOAEs). The sound level and number of impulses presented were sequentially increased throughout the study. STUDY SAMPLE Participants were normal-hearing students at the University of Florida who provided written informed consent prior to participation. RESULTS TTS was not reliably induced by any of the exposure conditions assessed here. However, there was significant individual variability, and a subset of subjects showed TTS under some exposure conditions. CONCLUSIONS A subset of participants demonstrated reliable threshold shifts under some conditions. Additional experiments are needed to better understand and optimize stimulus parameters that influence TTS after simulated impulse noise.
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Affiliation(s)
- C Spankovich
- Department of Speech, Language, and Hearing Sciences, University of Florida , Gainesville , USA
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A longitudinal study of changes in distortion-product otoacoustic emissions and pure-tone thresholds in an industrial setting. Eur Arch Otorhinolaryngol 2013; 271:2649-60. [PMID: 24114066 DOI: 10.1007/s00405-013-2754-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 10/02/2013] [Indexed: 10/26/2022]
Abstract
In a longitudinal study of 76 noise-exposed industrial workers, 34 (68 ears) of them were available for final evaluation after 9 years of observation. Distortion-product otoacoustic emissions (DP) at 65/55 dB SPL and pure-tone audiometry were used to detect noise-induced inner ear changes. Repeated measures analyses of variance were made on the subjects and in a control group, whereas significant threshold shifts (STS) and significant emission shifts (SES) were calculated. Both hearing thresholds and DP showed a high-frequency deterioration, but there was absence of statistical correlation between elevation of hearing thresholds and decrease of DP. There was no clear pattern between individual changes in audiometric thresholds and DP, and all combinations were present: ears with only STS, ears with only SES, ears with both STS and SES and ears with absence of STS and SES. Audiometric changes were maximal at 4 and 6 kHz and DP changes at 2 and 3 kHz. Since significant individual emission changes do not necessarily follow the same pattern as the group-averaged results, the use of DP for monitoring of individual subjects is not advised. However, its use in conjunction with audiometry in hearing conservation programs is highly recommended.
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Hoth S, Gudmundsdottir K, Plinkert P. Age dependence of otoacoustic emissions: the loss of amplitude is primarily caused by age-related hearing loss and not by aging alone. Eur Arch Otorhinolaryngol 2009; 267:679-90. [DOI: 10.1007/s00405-009-1106-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2008] [Accepted: 09/11/2009] [Indexed: 10/20/2022]
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Bockstael A, Keppler H, Dhooge I, D'haenens W, Maes L, Philips B, Vinck B. Effectiveness of hearing protector devices in impulse noise verified with transiently evoked and distortion product otoacoustic emissions. Int J Audiol 2009; 47:119-33. [DOI: 10.1080/14992020701704784] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Danielidis V, Tsimpiris N, Balatsouras DG, Polychronidis A, Perente S, Papadopoulos N, Ypsilantis P, Simopoulos C. Short-Term Pathophysiologic Changes and Histopathologic Findings of the Auditory Pathway after Closed Head Injury, Using a Rabbit Model. ACTA ACUST UNITED AC 2007; 12:145-54. [PMID: 17259700 DOI: 10.1159/000099016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Accepted: 09/27/2006] [Indexed: 11/19/2022]
Abstract
Hearing impairment is a well-known consequence of closed head injury (CHI). The aim of this study was to elucidate the pathogenesis of CHI-induced hearing loss, using a rabbit model. Twelve New Zealand white rabbits were divided into two groups of 6. In the first group, CHI was induced mechanically, whereas the rabbits of the second group served as controls. Baseline distortion product otoacoustic emissions (DPOAEs), contralateral suppression (CS) of the DPOAEs and auditory brainstem response (ABR) were obtained. The same measurements were performed in the first group after CHI. Three hours later, the animals were sacrificed and their brain was excised and subjected to histopathologic examination. Mean I-III ABR latencies were increased and DPOAE amplitudes and CS values were reduced in the trauma group after CHI, at a statistically significant level. Histopathologic examination of the temporal lobe and brainstem showed multiple hemorrhagic and necrotic areas, with edema in the surrounding region. The vestibulocochlear nerve was severely damaged at its emerging site at the brainstem. In conclusion, both peripheral and central involvement of the auditory pathway was found after CHI. Otoacoustic emissions in conjunction with ABR may provide significant information on both peripheral and central auditory function.
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Affiliation(s)
- Vasilios Danielidis
- Department of Otorhinolaryngology, School of Medicine, Democritus University of Thrace, Dragana, Alexandroupolis, Greece
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