NHCA 2021 Virtual Conference has ended
Welcome to the 2021 NHCA Virtual Conference Schedule, below you will find the schedule listed with 3 types of education sessions, Live Platform, Pre-recorded Platform and E-Poster Sessions. They will all be delivered a little differently so please take a little time to read the descriptions and understand how the conference will be laid out.

  • Live Platforms: NHCA is offering 7 live sessions with interactive Q&A and chat features over the two days of the live conference. If you are not able to watch these sessions live they will be recorded and playback will be available until March 19, 2021
  • ON DEMAND Pre-Recorded Platforms: There will be 28 pre-recorded sessions that will be released on the first day of the conference, these will be available to watch at your leisure and will be available until March 19, 2021. PLEASE NOTE: They are available longer than the 1-5 pm time on the schedule but we are not able to program them in like that!
  • ON DEMAND E-Poster Sessions: There will be 8 E-Poster sessions available to watch, each session is 15 minutes long and worth a quarter of a credit, in order to receive a full hour you will need to watch 4 poster sessions all the way through and complete and evaluation. These will be available as pre-recordings and will be available from the start of the conference until March 19, 2021
This means you have the opportunity for up to 19.0 CE credits at this years conference! (See ASHA AND AAA Brand Blocks below)

If you are trying to login to the learning center to attend the conference, please CLICK HERE to go to the Learning Center, this is just a digital agenda!
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Friday, February 26 • 12:45pm - 1:15pm
Live Session 4: The association between hearing loss and hearing protector attenuation among miners

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Elon Ullman, University of Michigan
Lauren Smith, University of Michigan
Sandar Bregg, University of Michigan
Marjorie McCullagh, University of Michigan

This study used data collected under a larger study on noise exposure and injury rates among miners to investigate risk factors for poor earplug fit, with a focus on the association between hearing loss and personal attenuation ratings. Earplug fit was assessed by obtaining Personal Attenuation Ratings (PARs) using a Real Ear at Threshold (REAT) system. Hearing loss was assessed using the unoccluded hearing levels measured during the REAT testing and the results of a speech-in-noise test. We found high HPD usage (HPD worn on average 73.9% of the time) in a high noise environment (mean Time-Weighted Average exposure 85.5 dBA, range 65 - 103 dBA) among 207 participating workers from 11 aboveground mine sites. One quarter (26.7%) of workers had hearing loss, and 42% reported symptoms of tinnitus. PARs were highly variable (mean 25.4 dB, range 1.8 - 43.2 dB), and HPD use time was positively associated with noise exposure level. The results of adjusted linear regression models suggest that workers with a hearing loss achieved significantly lower PARs than those with normal hearing. Workers with hearing loss or a standard threshold shift should be prioritized for fit testing, as their hearing impairment may associated with poor HPD fit.

Learning Objectives:
As a result of this Continuing Education Activity, readers will be able to:
1) Classify areas of concern for hearing conservation program enrollment and personal protective equipment requirements.
2) Design noise maps to visual represent noise level measurements.
3) Manage priorities for OSHA compliance and personnel protection for noise exposed populations.

avatar for Richard Neitzal

Richard Neitzal

University of Michigan (UM) School of Public Healt
Rick Neitzel, PhD, CIH, FAIHA is an Associate Professor of Environmental Health Sciences at the University of Michigan (UM) School of Public Health. He is also an Associate Professor of Global Public Health and Associate Director of the UM Office of Global Public Health. He has published... Read More →

Friday February 26, 2021 12:45pm - 1:15pm CST