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Mining Publication: Current State of Insert-Type Hearing Protector Fit-Testing: Follow-On Measurements in the Steel Industry and Fit-Testing in a Mobile Environment
Keywords: Audiograms Ear and hearing protection
Original creation date: January 2002
Authors: KL Michael, DC Byrne
Peer Reviewed Journal Article - January 2002
Download PDF Document (2.01 MB)
NIOSHTIC2 Number: 20022843
Spectrum 2002 Jan 19(1):14-16
In a previous issue of Spectrum (October 1999, 16/4), a system of measuring the attenuation provided by insert-type hearing protectors was described. That report described experiences using the FitCheck (Michael & Associates, Inc.) System in a pilot project involving the steel industry during 1998. The FitCheck system utilizes a set of large custom-designed headphones that stand off of the ears and do not affect hearing protector fit. These headphones are used to conduct audiograms on individuals who wear insert-type hearing protectors, both with the hearing protection device (HPDs) fitted and with the ears open. The attenuation provided at each test frequency is calculated by first subtracting the cars open threshold from the cars occluded threshold. This value is then adjusted by applying a regressions equation correction that allows direct comparison to laboratory data. This small correction factor is applied to account for the difference between headphone and sound field audiometric procedures.
Image of publication Current State of Insert-Type Hearing Protector Fit-Testing: Follow-On Measurements in the Steel Industry and Fit-Testing in a Mobile EnvironmentPeer Reviewed Journal Article - January 2002
Download PDF Document (2.01 MB)
NIOSHTIC2 Number: 20022843
Spectrum 2002 Jan 19(1):14-16
See Also
Contemporary Technology for Hearing Conservation Audiometric Monitoring
Cross-Sectional Survey of Noise Exposure in the Mining Industry
An Evaluation of Sound Restoration Hearing Protection Devices and Audibility Issues in Mining
An Examination of Antecedents to Coal Miners' Hearing Protection Behaviors: A Test of the Theory of Planned Behavior
How Can I Test My Hearing Protection?
Inquiring Ears Want to Know: A Fact Sheet about Your Hearing Test
Noise and Hearing Protection: Development of Two Training Exercises for Drillers
Sound Restoration Hearing Protection: Genesis of a Standard Test Method
Using Persuasive Messages to Encourage Voluntary Hearing Protection Among Coal Miners
Wearing Hearing Protection Properly: A 3-D Training Aid for Drillers
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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