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James F. Grenell

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Publications by James F. Grenell (bibliography)

1988

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Casali, John G. and Grenell, James F. (1988): How Physical Work Activity and Certain Earmuff Design Attributes Influence Achieved Hearing Protection. In: Proceedings of the Human Factors Society 32nd Annual Meeting 1988. pp. 995-999.

“Laboratory tests of personal hearing protectors typically overestimate the attenuation performance of the devices in the workplace, where a number of factors reduce protection levels. This research investigated several practical factors including the influence of the user's work-related movement, and variations in headband compression force and ear cup cushion material (liquid- or foam-filled) on the noise attenuation achieved with earmuff hearing protectors. Attenuation data were collected on 24 subjects both prior-to and following completion of a simulated work task. Work-related movement was found to significantly decrease attenuation. A high compression headband provided increased attenuation, while there was no significant difference between cushion types as to protection achieved.”

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