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!
Back To Schedule
Saturday, February 27 • 2:00pm - 2:30pm
ON DEMAND SESSION: Acoustic Standards for High-level Impulse Noise

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Gregory Flamme, SASRAC
Elizabeth Brokaw, MITRE Corp
Raj Gupta, US Army

High-level impulse noise has been a significant source of hearing loss among active duty military personnel, veterans, law enforcement and recreational firearm users. The development of standards for estimating the risk of hearing loss due to such exposures is complicated by a lack of human exposure data. Following World War II, the Army Research Laboratory conducted a limited series of studies that led to the development of MIL-STD 1474, which was based on peak exposure level and envelope duration. In the late 1980s, the US Army recognized that large caliber weapons had different outcomes than small-caliber firearms. The Army conducted the Albuquerque Blast Overpressure Walk-up studies that led to extensive debate about how to estimate the risk of hearing loss from these sounds. The DoD Blast Injury Prevention Standards Recommendation Process evaluated several candidate noise exposure metrics including equivalent energy exposure, Auditory Hazard Assessment Algorithm for Humans, Integrated Cochlear Energy model, and Auditory Model 4.5. Weapon noise measurements were used to highlight how maximum permissible exposures provide a framework that relates the disparate predictions from the models.

Learning Objectives:
As a result of this Continuing Education Activity, readers will be able to:
1) Participants will learn about different methods to assess Impulse Noise
2) Participants will learn about issues with accurate recordings and assessment of weapon noise
3) Participants will learn about the use of Maximum Permissible Exposures to compare Damage Risk Criteria

avatar for William Murphy

William Murphy

William J. Murphy is a Captain in the United States Public Health Service Commissioned Corps and is coordinator for the Hearing Loss Prevention cross sector for the National Institute for Occupational Safety and Health. He is an active member of the National Hearing Conservation Association... Read More →

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