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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Saturday, February 27 • 2:00pm - 2:30pm
ON DEMAND SESSION: Audiometric outcomes,machining processes, and noise control materials in manufacturing

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Richard Sesek, Auburn University
Kellen Legge, Auburn University
Hayley Hack, Auburn University

Most manufacturing industries struggle to maintain OSHA compliance due to difficulties in control of noisy machining processes and audiometric monitoring of workers. The first aim of the current study was to evaluate typical audiometric threshold shifts over time sustained by workers employed in a bearings manufacturing plant. We looked at 74 serial tests of pure tone audiograms in manufacturing workers to investigate possibility of longitudinal changes in hearing sensitivity over time. Statistically significant but minimal threshold shifts were seen over time, supporting the value of audiometric monitoring annually. The second aim of this study was to evaluate Leq (predicted over an 8 hour TWA) for typical noisy machining processes in a muffler manufacturing plant. We found three types of processes (stamping, deburring, shearing) that were hazardous and differed in terms of the frequency spectrum of the generated noise. The third aim of the study was to investigate the noise reduction offered by low-cost insulation materials. We measured the absorption coefficient as a measure of the decrease in the intensity ratio of sound as it passes through a given substance. The absorption coefficient for that of polystyrene was significantly higher than that for vinyl for all frequencies.

Learning Objectives:
As a result of this Continuing Education Activity, readers will be able to:
1) Identify noisy machining processes in manufacturing
2) Identify low-cost sound absorption materials for Hearing Conservation Programs.
3) Identify the role of audiometric monitoring for identifying threshold shifts in manufacturing workers.

avatar for Sridhar Krishnamurti

Sridhar Krishnamurti

Auburn University
Dr. Sridhar Krishnamurti is Professor and Program Director of Audiology at Auburn University. He currently serves on the research grants review panel for the Alzheimer’s Association and is also on the review board of several agencies and journals including Ear and Hearing, American... Read More →

Saturday February 27, 2021 2:00pm - 2:30pm CST