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Advanced Hearing Protector Study Conducted at: General Motors Metal Fabricating Division, Flint Metal Center - Flint, MI, January 2004 - February 2005.

PB2008113769

Publication Date	2007
Personal Author	Murphy, W. J.; Davis, R. R.; Byrne, D. C.; Franks, J. R.
Page Count	42
Abstract	National Institute for Occupational Safety and Health (NIOSH) investigators were requested to evaluate the use of customized hearing protection devices for comfort, acceptance, and noise reduction performance. This request came from the UAW-GM Center for Human Resources (UAW-GM CHR). The plant selected for the study was the Flint Metal Center in Flint, Michigan. With the assistance of the United Auto Workers Local 659, a total of 228 workers were recruited for a study to evaluate an advanced technology semi-custom earplug made by Sonomax Hearing Healthcare, Inc. NIOSH developed a protocol for an investigation which tested three groups of employees: (1) Group A was fit with the custom-molded earplug; (2) Group B was fit with hearing protectors already available in the plant, and was counseled on proper fitting and selection of hearing protection; and (3) Group C used protectors available in the plant but was not directly counseled regarding selection or fitting of hearing protection. NIOSH investigators made four visits to the facility in February 2004, March 2004, June 2004, and January/February 2005. Objective measurements of hearing protector performance along with the subjective evaluation of employees beliefs, attitudes, and hearing protector comfort was assessed during each visit. Individual hearing tests were administered during the first and last visits.
Keywords	Ear protectors Noise protection Occupational exposure Noise control Industrial moise Workplace studies Workers Automotive industry Noise exposure Longitudinal performance Hearing thresholds Noise pollution control Methods Evaluation criteria Recommendations Hearing tests Questionnaires Hearing protection Hearing protector attenuation testing
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200826

Advanced Hearing Protector Study Conducted at: General Motors Metal Fabricating Division, Flint Metal Center - Flint, MI, January 2004 - February 2005.

Advanced Hearing Protector Study Conducted at: General Motors Metal Fabricating Division, Flint Metal Center - Flint, MI, January 2004 - February 2005.
PB2008113769

Publication Date	2007
Personal Author	Murphy, W. J.; Davis, R. R.; Byrne, D. C.; Franks, J. R.
Page Count	42
Abstract	National Institute for Occupational Safety and Health (NIOSH) investigators were requested to evaluate the use of customized hearing protection devices for comfort, acceptance, and noise reduction performance. This request came from the UAW-GM Center for Human Resources (UAW-GM CHR). The plant selected for the study was the Flint Metal Center in Flint, Michigan. With the assistance of the United Auto Workers Local 659, a total of 228 workers were recruited for a study to evaluate an advanced technology semi-custom earplug made by Sonomax Hearing Healthcare, Inc. NIOSH developed a protocol for an investigation which tested three groups of employees: (1) Group A was fit with the custom-molded earplug; (2) Group B was fit with hearing protectors already available in the plant, and was counseled on proper fitting and selection of hearing protection; and (3) Group C used protectors available in the plant but was not directly counseled regarding selection or fitting of hearing protection. NIOSH investigators made four visits to the facility in February 2004, March 2004, June 2004, and January/February 2005. Objective measurements of hearing protector performance along with the subjective evaluation of employees beliefs, attitudes, and hearing protector comfort was assessed during each visit. Individual hearing tests were administered during the first and last visits.
Keywords	Ear protectors Noise protection Occupational exposure Noise control Industrial moise Workplace studies Workers Automotive industry Noise exposure Longitudinal performance Hearing thresholds Noise pollution control Methods Evaluation criteria Recommendations Hearing tests Questionnaires Hearing protection Hearing protector attenuation testing
Source Agency	National Institute for Occupational Safety and Health
Corporate Authors	National Inst. for Occupational Safety and Health, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200826