Occlusion effects of hearing protection device on ear canal transfer function and cochlear injury from impulse noise exposure

2018 ◽  
Vol 143 (3) ◽  
pp. 1934-1935
Author(s):  
Brissi Zagadou
Keyword(s):  
Transfer Function ◽  
Impulse Noise ◽  
Noise Exposure ◽  
Hearing Protection ◽  
Protection Device ◽  
Ear Canal

Over-the-Ear Industrial Hearing Protectors: An Assessment of Comfort Issues

1986 ◽  
Vol 30 (14) ◽  
pp. 1428-1432 ◽  
Author(s):  
John G. Casali ◽  
Siu T. Lam
Keyword(s):  
Rating Scale ◽  
Statistical Analyses ◽  
Self Report ◽  
Hearing Protection ◽  
Protection Device ◽  
Device Design ◽  
Ear Canal ◽  
Hearing Protectors ◽  
Ranking Procedures ◽  
Protection Devices

A self-report methodology was developed for evaluating perceived comfort and related wearability issues among non-earplug hearing protection devices. Rating scale and ranking procedures were completed by fifty subjects after wearing four different noise-attenuating earmuffs and two ear canal caps. The methodology reliably distinguished among different earmuff types and earcaps on a variety of comfort-related measures, as determined by non-parametric statistical analyses. In general, over-the-pinna muffs were found to be more comfortable than over-the-ear canal earcaps, and some muff designs were preferable to others. The earmuffs were also ranked as easier to don than earcaps. It is critical that comfort be a prime consideration in hearing protection device design because it greatly influences the amount of time the device will be worn in the workplace.

Assessment of Impulse Noise Hazard and the Use of Hearing Protection Devices in Workplaces Where Forging Hammers are Used

2015 ◽  
Vol 39 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Rafał Młyński ◽  
Emil Kozłowski ◽  
Jan Adamczyk
Keyword(s):  
Sound Pressure Level ◽  
Impulse Noise ◽  
Sound Pressure ◽  
Noise Exposure ◽  
Pressure Level ◽  
Hearing Protection ◽  
Exposure Level ◽  
Limit Values ◽  
Noise Parameters ◽  
Protection Devices

Abstract The impulse noise is agent harmful to health not only in the case of shots from firearms and the explosions of explosive materials. This kind of noise is also present in many workplaces in the industry. The paper presents the results of noise parameters measurements in workplaces where four different die forging hammers were used. The measured values of the C-weighted peak sound pressure level, the A-weighted maximum sound pressure level and A-weighted noise exposure level normalized to an 8 h working day (daily noise exposure level) exceeded the exposure limit values. For example, the highest measured value of the C-weighted peak sound pressure level was 148.9 dB. In this study possibility of the protection of hearing with the use of earplugs or earmuffs was assessed. The measurement method for the measurements of noise parameters under hearing protection devices using an acoustical test fixture instead of testing with the participation of subjects was used. The results of these measurements allows for assessment which of two tested earplugs and two tested earmuffs sufficiently protect hearing of workers in workplaces where forging hammers are used.

Fit testing of a hearing protection device with integrated in-ear noise exposure monitoring

2018 ◽  
Vol 143 (3) ◽  
pp. 1910-1910
Author(s):  
Christopher J. Smalt ◽  
Shakti K. Davis ◽  
William J. Murphy ◽  
Chucri A. Kardous ◽  
Joe Lacirignola ◽  
...  
Keyword(s):  
Noise Exposure ◽  
Hearing Protection ◽  
Protection Device ◽  
Exposure Monitoring ◽  
Fit Testing

scholarly journals Method for protected noise exposure level assessment under an in-ear hearing protection device: a pilot study

2020 ◽  
Vol 60 (1) ◽  
pp. 60-69
Author(s):  
Vincent Nadon ◽  
Fabien Bonnet ◽  
Rachel E. Bouserhal ◽  
Antoine Bernier ◽  
Jérémie Voix
Keyword(s):  
Pilot Study ◽  
Noise Exposure ◽  
Hearing Protection ◽  
Exposure Level ◽  
Protection Device

A Prototyping Model of Intelligent Hearing Protection Device

2015 ◽  
Vol 74 (4) ◽  
Author(s):  
Lim Ming Han ◽  
Zaiton Haron ◽  
Zanariah Jahya ◽  
Nadirah Darus ◽  
Mohamad Fauzi Abdul Hamid
Keyword(s):  
Noise Level ◽  
Noise Exposure ◽  
Electronic Device ◽  
Hearing Protection ◽  
Protection Device ◽  
Technical Procedure ◽  
Hearing Protectors ◽  
Noise Data ◽  
Exposure Problem ◽  
Procedure Development

The occupational noise exposure problem is getting serious and the workers have low self-efficacy in using the hearing protectors during the working period. In this paper, it reveals a prototyping model, namely, Intelligent Hearing Protection Device (IHPD) as a new hearing technology to cope with current problems. This device could measure the noise level in the workplace, detect the regularity of worker in the usage of IHPD and indicate the high noise area. Meanwhile, the IHPD is required to connect with the Dosiwatch and the Integrated Noise Exposure Software (INES) to improve its functionalities. The Dosiwatch is an electronic device to display the noise level and indicate the risky area, where it helps the workers to perceive the risk of noise in a workplace. The INES receives the noise data wirelessly, plots the instantaneous noise charts and supervises the regularity of workers in using the IHPD. By the way, the technical procedure development and the typical function of electronic gadgets are significant in this invention. A prototyping model was developed to ensure the technical procedure development meets the conceptual design of IHPD, dosiwatch and INES.

Noise Exposure and Hearing Disorders

2017 ◽  
Author(s):  
David C. Byrne ◽  
Thais C. Morata
Keyword(s):  
Hearing Loss ◽  
Noise Exposure ◽  
Hearing Protection ◽  
Noise Induced Hearing Loss ◽  
Hearing Disorders ◽  
Industrial Noise ◽  
Significant Impairment ◽  
Protection Devices ◽  
The Impact ◽  
Occupational Hearing Loss

Exposure to industrial noise and the resulting effect of occupational hearing loss is a common problem in nearly all industries. This chapter describes industrial noise exposure, its assessment, and hearing disorders that result from overexposure to noise. Beginning with the properties of sound, noise-induced hearing loss and other effects of noise exposure are discussed. The impact of hearing disorders and the influence of other factors on hearing loss are described. Typically, noise-induced hearing loss develops slowly, and usually goes unnoticed until a significant impairment has occurred. Fortunately, occupational hearing loss is nearly always preventable. Therefore, this chapter gives particular attention to recommendations for measures to prevent occupational hearing loss such as engineering noise controls and hearing protection devices.

scholarly journals The Effectiveness of Hearing Protection Devices: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 18 (21) ◽  
pp. 11693
Author(s):  
Chanbeom Kwak ◽  
Woojae Han
Keyword(s):  
Systematic Review ◽  
Speech Perception ◽  
Sound Localization ◽  
Noise Exposure ◽  
Meta Analysis ◽  
Random Effect ◽  
Random Effect Model ◽  
Sound Attenuation ◽  
Hearing Protection ◽  
Protection Devices

To prevent intensive noise exposure in advance and be safely controlled during such exposure, hearing protection devices (HPDs) have been widely used by workers. The present study evaluates the effectiveness of these HPDs, partitioned into three different outcomes, such as sound attenuation, sound localization, and speech perception. Seven electronic journal databases were used to search for published articles from 2000 to 2021. Based on inclusion criteria, 20 articles were chosen and then analyzed. For a systematic review and meta-analysis, standardized mean differences (SMDs) and effect size were calculated using a random-effect model. The funnel plot and Egger’s regression analysis were conducted to assess the risk of bias. From the overall results of the included 20 articles, we found that the HPD function performed significantly well for their users (SMDs: 0.457, 95% confidence interval (CI): 0.034–0.881, p < 0.05). Specifically, a subgroup analysis showed a meaningful difference in sound attenuation (SMDs: 1.080, 95% CI: 0.167–1.993, p < 0.05) when to wear and not to wear HPDs, but indicated no significance between the groups for sound localization (SMDs: 0.177, 95% CI: 0.540–0.894, p = 0.628) and speech perception (SMDs: 0.366, 95% CI: −0.100–1.086, p = 0.103). The HPDs work well for their originally designated purposes without interfering to find the location of the sound sources and for talking between the workers. Taking into account various factors, such as the characteristics of the users, selection of appropriate types, and fitting methods for wearing in different circumstances, seems to be necessary for a reliable systematic analysis in terms of offering the most useful information to the workers.

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