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 • 10:30am - 11:00am
Live Session 2: The Need for a Re-Examination of ISO 1999

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Wei Qiu, Auditory Research Lab, SUNY Plattsburgh
Barry Lempert, USPHS, Ret.

The Need for a Re-Examination of ISO 1999 There are two major reasons to re-examine ISO 1999 and its U.S. counterpart, ANSI S3.44. The first is that the formulas to predict noise-induced hearing loss do not reflect the data on which these standards were originally based. Evidence from a recent study of the data and formula will be presented. The second reason is that the use of the equal energy rule (or 3-dB exchange rate) is not sufficiently protective for noises other than continuous or Gaussian noise. The earliest attempts at formulating criteria were based mainly on exposure to continuous noise, and, until recently, there has been a lack of attention paid to the temporal pattern of noise exposure. However, new developments using the kurtosis metric indicate that complex, non-Gaussian noise, which is common in many industrial conditions, is more damaging than Gaussian noise of equivalent energy. ISO 1999 and ANSI S3.44 provide the basis by which agencies or organizations develop damage-risk criteria for the protection of workers’ hearing, and thus it is important that their predictions accurately reflect the effect on hearing.

As a result of this Continuing Education Activity, readers will be able to:
1) Participants will describe the background on the original attempts to standardize methods to predict noise-induced hearing loss.
2) Participants will describe the differential effects of continuous (Gaussian) noise and complex (non-Gaussian) noise.
3) Participants will discuss the difference between earlier and contemporary versions of ISO 1999 and the data used to formulate these standards.

avatar for Alice Suter

Alice Suter

Suter & Associates
Alice Suter has worked in the area of noise effects and hearing conservation for more than 40 years. She has been influential in noise criteria development, regulation, and public policy, first at the U.S. EPA’s Office of Noise Abatement and later at OSHA. As Senior Scientist and... Read More →

Friday February 26, 2021 10:30am - 11:00am CST