Uncertainty calculation for hearing protector noise attenuation measurements by REAT method
نویسندگان
چکیده
منابع مشابه
Training on hearing protector insertion improves noise attenuation.
PURPOSE To determine the efficacy of hearing protector insertion by comparing attenuation values measured by objective (MIRE) and subjective (REAT) methods in groups with and without training. METHODS The study included 80 male subjects assigned to experimental (with training) and control (without training) groups. The following procedures were performed: occupational history, objective and s...
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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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There are numerous well-documented measurement methods available to evaluate hearing protector attenuation, however, some are flawed or difficult to implement and some can and have been misused with the erroneous results fostering misleading conclusions. This paper will examine the three most robust methods including the “gold standard” in hearing protector attenuation measurements, namely real...
متن کاملA psychophysical evaluation of the dependence of hearing protector attenuation on noise level.
The attenuation characteristics of ten commercially available hearing protectors (five muffs and five plugs) were examined for 1/3-octave bands of noise centered at 1000, 2000, 3150, 4000, and 6300 Hz in ten normal-hearing young adults utilizing four psychophysical procedures. One of these procedures, the real-ear attenuation at threshold procedure described in the American standard for the eva...
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Concern has often been expressed that the performance of hearing protectors in steady noise may not apply to their performance in impulse noise. Our current.studies, as well as other studies, support the fact that there is a large difference in performance. In all cases, the performance of a protector is much better for impulse noise than for continuous noise. For example, we are obtaining at l...
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ژورنال
عنوان ژورنال: Journal of the Brazilian Society of Mechanical Sciences and Engineering
سال: 2010
ISSN: 1678-5878
DOI: 10.1590/s1678-58782010000100005