Intra-Subject Fit Variability for Field Microphone- In-Real-Ear Attenuation Measurement for Custom Molded Earplugs
نویسندگان
چکیده
منابع مشابه
Variability 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...
متن کاملAttenuation as a function of the canal length of custom-molded earplugs: a pilot study.
Custom-molded earplugs (CMEPs) whose canal segments extend beyond the second bend of the ear canal can provide excellent attenuation but can sometimes be uncomfortable. Attenuation was measured for CMEPs whose canal segments were shortened in 2-mm increments. The within-subjects design permitted illustration of the form of the function relating attenuation to canal segment length for individual...
متن کاملTitle : 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 and proper insertion of earplugs into ear canals.
OBJECTIVES The study was done to determine whether the noise attenuation attained with the use of earplugs can be improved by teaching the proper insertion of earplugs to users. METHODS Fifty-four randomly selected male subjects were divided into an untrained group (25 persons) and a trained group (29 persons). The trained group was given a lecture on earplug insertion and allowed to practise...
متن کاملConsistency of attenuation across multiple fittings of custom and non-custom earplugs.
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...
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ژورنال
عنوان ژورنال: The International Journal of Acoustics and Vibration
سال: 2010
ISSN: 2415-1408
DOI: 10.20855/ijav.2010.15.4271