Effect of electronic ANR and conventional hearing protectors on vehicle backup alarm detection in noise
| Autor: | Dan Gauger, John G. Casali, Erika C. Dabney, Gary S. Robinson |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Computer science Noise reduction Ambient noise level United States Occupational Safety and Health Administration Poison control Human Factors and Ergonomics Industrial noise Audiology Sensitivity and Specificity 050105 experimental psychology Behavioral Neuroscience medicine Humans 0501 psychology and cognitive sciences Detection theory Ear Protective Devices 050107 human factors Applied Psychology Noise barrier business.industry 05 social sciences Middle Aged United States Noise Motor Vehicles Hearing Loss Noise-Induced Colors of noise Noise Occupational Equipment Failure Female Telecommunications business |
| Zdroj: | Human factors. 46(1) |
| ISSN: | 0018-7208 |
| Popis: | An experiment was conducted wherein masked thresholds (using ascending method of limits) for a backup alarm were obtained in pink and red noise at 85 and 100 dBA for 12 participants immersed in a probability monitoring task and wearing a conventional passive hearing protection device (HPD, an earmuff or a foam earplug), an active noise reduction (ANR) headset, or no HPD at all (only in 85 dBA noise). Results revealed statistically significant between-HPD differences in red noise (from 2.3 to 3.1 dB) and in the 100-dBA noise level (from 2.6 to 4.3 dB). An additional finding, which corroborates other studies using different protocols, was that masked thresholds in 85-dBA noise were significantly lower (from 3.2 to 4.4 dB) for the occluded conditions (wearing an HPD) than for the open-ear (unoccluded) condition. This result refutes the belief among many normal-hearing workers that the use of HPDs in relatively low levels of noise compromises their ability to hear necessary workplace sounds. Actual or potential applications of this research include (a) the selection of appropriate HPDs for low-frequency-biased noise exposures wherein signal detection is important and (b) gaining insight into the appropriateness of ANR-based HPDs for certain industrial noise environments. |
| Databáze: | OpenAIRE |
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