PLEASE NOTE: All On-Demand sessions will not actually take place at the date and time below, we will be sending out access to these sessions the Monday before the conference starts and they will be available to watch on your own time for a month after the conference!

**This Agenda is Subject to Change**
Back To Schedule
Saturday, February 12 • 3:00pm - 8:00pm
*Evaluating earplug performance over a workshift with a fit-test system

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

Feedback form is now closed.
The attenuation of hearing protection devices (HPD) can change when workers are physically active or when the temporomandibular joint moves. Some earplugs may be more prone to stability issues over a workshift. This study measured changes in personal attenuation ratings of three foam and three premolded earplugs over the course of a 2-hour workshift for thirty factory workers: twenty workers were tested in year 1; nineteen in year 2; and twenty-one in year 3. Not all workers participated in the three years. The personal attenuation ratings (PARs) were measured at the beginning and end of a 2-hour work shift. Workers were initially fit tested to confirm they obtained a PAR of at least 15 dB. Workers were instructed not to touch or adjust their earplugs in any way. To ensure both that workers did not touch their earplugs as well as to ensure workers were protected from noise exposures if their earplugs slipped, workers wore an electronic earmuff. Open-ear and occluded-ear thresholds at 500, 1000, and 2000 Hz for third-octave bands of noise were measured with the NIOSH HPD Well-Fit™ system to estimate PARs.

avatar for William Murphy, Ph.D.

William Murphy, Ph.D.

Coordinator, Hearing Loss Prevention, CDC NIOSH
CAPT William J. Murphy is the coordinator for the Hearing Loss Prevention cross sector for National Institute for Occupational Safety and Health. He works in the Division of Field Studies and Engineering, Engineering and Physical Hazards Branch, and the Noise and Bioacoustics Team... Read More →

Saturday February 12, 2022 3:00pm - 8:00pm CST