Real-world attenuation of custom-moulded earplugs: Results from industrial in situ F-MIRE measurements
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منابع مشابه
Title : Real - world attenuation of custom - moulded earplugs : Results from industrial in situ F - MIRE measurements
The attenuation provided by hearing protection devices (HPDs) is traditionally determined under laboratory conditions by means of a standardised method titled REAT (Real Ear Attenuation at Threshold). This performance is often overestimated compared to what has been measured so far in industrial reality. Concerning the earmuff, the formable earplug and preformed earplug type of HPD, there are n...
متن کاملNoise attenuation of earplugs as measured by hREAT and F-MIRE methods in a Japanese metal manufacturing plant.
OBJECTIVE The aim of this study was to compare the noise attenuation (NA) properties of earplugs by using the headphone-based real-ear-attenuation-at-threshold (hREAT) and field microphone-in-real-ear (F-MIRE) techniques. METHODS The subjects were 89 male workers (mean age: 44.8 ± 12.1 yr) exposed to noise above 85 dBA (mean noise exposure period: 14.3 ± 11.3 yr) in a Japanese nonferrous meta...
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Hearing protection devices (HPDs) play a significant role in protecting workers from occupational noise-induced hearing loss. Individual HPD fit-testing estimates the amount of protection, or attenuation, that an individual achieves from a given HPD as it is worn. Results from a single fit-test may not be representative of real-world HPD performance over time, however, due to inconsistency in h...
متن کاملVariability of real-world hearing protector attenuation measurements.
The attenuation provided by a hearing protection device (HPD) in the field is usually estimated by applying a derating factor to the laboratory-determined noise reduction rating (NRR) of the HPD. However, attenuation is highly dependent on individual-specific HPD fit. Prediction of an individual's attenuation depends on the accuracy of the measurement system and the variability of attenuation o...
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A review of fifty patients with wide ranging clinical conditions who had been fitted with one-piece moulded plastic spinal orthoses was carried out to determine prescription criteria for these orthoses. The review showed that patients with scoliosis (idiopathic and paralytic), kyphoscoliosis, as well as a selected number of patients with low back pain derive benefit. Patients with kyphosis and ...
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ژورنال
عنوان ژورنال: Applied Acoustics
سال: 2012
ISSN: 0003-682X
DOI: 10.1016/j.apacoust.2012.02.001