Protection and Enhancement of Hearing in Noise

Casali, John G.; Gerges, Samir N. Y.

doi:10.1177/1557234x0600200108

Cited by 5 publications

(5 citation statements)

References 40 publications

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“…With some exceptions, these are warnings presented through the visual modality. Chapter 6 by Morrow, North, and Wickens (2006) in Reviews of Human Factors and Ergonomics, Volume 1 and Chapter 7 by Casali and Gerges (2006) in the current volume describe research and application of auditory warnings in the contexts of hospital procedures and hearing protection. Because of the existence of these substantial reviews and because research on warnings in the visual and auditory modalities has not greatly overlapped (in part because they are different modalities and have substantially different properties), in this chapter, we focus on visual warnings.…”

mentioning

confidence: 99%

Designing Effective Warnings

Laughery¹,

Wogalter²

2006

Reviews of Human Factors and Ergonomics

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Since the early 1980s there has been an increased interest in research on warnings. This chapter has several objectives. First, we describe the purpose of warnings and where warnings fit with other safety considerations, such as design and guarding. Next, we present a model that incorporates both communication and information-processing concepts, which is characteristic of theoretical orientations that have guided much of the warning research. The research and application issues have generally focused on two themes: design factors and nondesign factors that influence warning effectiveness. Third, we review the progress and status of research and application, with an emphasis on identifying those factors that appear to be most important in determining warning effectiveness. Finally, we conclude with a discussion of some of the challenges and opportunities facing warning designers and researchers in the future.

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mentioning

confidence: 99%

Designing Effective Warnings

Laughery¹,

Wogalter²

2006

Reviews of Human Factors and Ergonomics

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“…Using the estimates of the coefficients presented in Table 2 3 ; thus, producing a series of parallel lines.…”

Section: Discussionmentioning

confidence: 99%

“…Other wearing configurations include helmets that provide hearing protection, the use of double hearing protection, and additional variants employing electronic circuitry. [3] There is no single type of device that is optimal for all individuals or situations. However, some types are better than others for use in specific noise environments, for some work activities, or for some environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Relationship between comfort and attenuation measurements for two types of earplugs

et al. 2011

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Noise-induced hearing loss is almost always preventable if properly fitted hearing protectors are worn to reduce exposure. Many individuals choose not to wear hearing protection because it may interfere with effective communication in the workplace or it may be uncomfortable. Hearing protector comfort has not received the same amount of attention as noise reduction capability. The present study was conducted to evaluate the comfort level of two different types of insert earplugs as well as the attenuation levels achieved by the earplugs. Attenuation levels were obtained with a commercially available earplug fit-test system, and the comfort ratings were obtained by questionnaire. The primary research objective was to determine whether hearing protector comfort was related to measured attenuation values. A linear mixed effects model provided evidence for an inverse relationship between comfort and attenuation.

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“…The market proposes many types of PPE, each one having different noise attenuation for different types of noisy sources, depending on both the amplitude of the sound than the frequency spectra [8]. The choice of the proper PPE requires, other than a careful analysis of the noisy sources, also the characterization of the different working tasks and areas in which they take place, in order to guarantee good protection and avoiding possible interferences with other protective equipment [9].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Active and Passive Noise Reduction Personal Protective Equipment: A Case Study in a Limestone Quarry Plant

Degan

Antonucci

Coltrinari

et al. 2021

WIT Transactions on the Built Environment

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In this study, an estimation of the behavior of three different passive and active personal ear protection equipment was done in order to evaluate their performances when used in a limestone quarry plant. Twenty measure points were chosen for the characterization of the noise emitted in the plant and for the calculation of the workers' noise exposition. Starting from the data we previously measured in laboratory tests, the noise reduction curves, characteristics of each protective equipment, were calculated for different configurations or ways of using. Results show that all the protection equipment are potentially able to reduce the noise level under the lower exposure limit in all the measured positions, but in most of the cases they produce hyper-protection. Differences were found for different ways of using or settings. When earplugs are not properly inserted, the noise could overcome 80 dB(A) in some of the points of our case study. When active earplugs are set to the maximum volume, the provided protection wasn't found to be sufficient in all of the noisier points of the plant. In some cases, depending on the spectra and amplitude of the external noise, the sound produced by active earplugs can also be higher than that measured in the external environment. On the contrary, when the earplugs are set on the middle volume, the protection was found to be always optimal. Since noise passing through active earplugs can be attenuated or amplified according to the amplitude of the external noise, the perceived sound is much more homogeneous, especially when passing across points at different noise levels, compared to that provided using passive earplugs. In conclusion, active earplugs, when properly set, could be the better choice, especially in those cases in which workers need to move across points at different noise levels. However, important is to correctly estimate the external noise and the properties of the active earplugs in order to give instruction to workers for their correct settings, so as to avoid both the hyper-than the under-protection.

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Protection and Enhancement of Hearing in Noise

Cited by 5 publications

References 40 publications

Designing Effective Warnings

Designing Effective Warnings

Relationship between comfort and attenuation measurements for two types of earplugs

Behavior of Active and Passive Noise Reduction Personal Protective Equipment: A Case Study in a Limestone Quarry Plant

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