In The News

Hearing Research - Current Insights

Posted: June 9, 2021

  • In a study of mice, Johns Hopkins researchers have found a molecular “switch” that turns off the animal’s ability to repair damaged inner ear cells. The findings shed light on regenerative abilities that are observed in many species of birds and fish, but not mammals, including humans. Li, XJ and Doetzlhofer, A (2020). LIN28B/let-7 control the ability of neonatal murine auditory supporting cells to generate hair cells through mTOR signaling, Proceedings of the National Academy of Sciences, Sep 2020, 117 (36) 22225-22236; DOI: 10.1073/pnas.2000417117.

  • Research led by Newcastle University has identified a ‘super-sensitized’ brain connection in people who suffer from an extreme reaction to triggering sounds such as chewing or loud breathing, often referred to as misophonia. They discovered increased connectivity in the brain between the auditory cortex and the motor control areas related to the face, mouth and throat. Kumar et al. (2021). The motor basis for misophonia, Journal of Neuroscience, 21 May 2021, JN-RM-0261-21; DOI: 10.1523/JNEUROSCI.0261-21.2021.

  • Researchers from Brigham and Women’s Hospital analyzed data from nearly 144,000 women who were followed for up to 34 years. They found that risk of subsequent moderate or worse hearing loss was up to 40 percent higher in study participants with osteoporosis or low bone density. The study also found that taking bisphosphonates, the primary medication used to prevent fractures in people with reduced bone density did not alter the risk of hearing loss. Curhan SG et al. (2021). Osteoporosis, bisphosphonate use, and risk of moderate or worse hearing loss in women, Journal of the American Geriatric Society, 1-11; DOI: 10.1111/jgs.17275.

CAOHC Updates Position Paper on Emerging Technologies

Posted: June 9, 2021

The Council for Accreditation in Occupational Hearing Conservation (CAOHC) recently released a revised position statement on Emerging Technology and Science. This statement supersedes the original CAOHC position statement on Tablet Audiometry issued in April 2019.CAOHC believes regulators have a duty to revise policy and statutory requirements to reflect advances in technology and emerging scientific evidence about physical and chemical occupational hazards to hearing. In particular, CAOHC encourages Federal and state regulators, researchers, and standards entities to assess emerging audiometric technology performance and comment on their practical use in hearing conservation programs. For the full Position Statement, click here.


Sound Postcard 

Posted June 9, 2021

Summer has (finally) arrived, finding us longing for lazy days at the beach. So what better way to celebrate summer than indulging in underwater acoustic recordings of marine life? Enjoy “Sounds of the Ocean” and accompanying spectrograms compiled by the National Oceanic and Atmospheric Administration (NOAA).

(Photo Credit: Humpback Whale and spectrogram,



Upcoming Webinars - An Advantage of NHCA!!

Posted: May 5, 2021

The 2021 NHCA/CAOHC webinar series is underway! Mark your calendars and register for two upcoming workshops. CEUs are available from AAA and ASHA for attendance of live programs. NHCA members pay a reduced rate. Previous webinars are available on demand for home study.  To learn more and register, click here:

TopicAge Adjustment in Occupational Hearing Conservation Programs
When: May 13, 2021 at 2 pm EST 
About the Webinar: The tables used by OSHA to adjust occupational audiograms for the effects of age were developed over 50 years ago. In this presentation, we describe new data that suggest the OSHA tables over-adjust for age effects, resulting in reduced sensitivity to detection of noise-induced hearing loss.
Presenters: Greg Flamme, Ph.D. and Kristy Deiters, Au.D.

TopicImpulsive Noise: Understanding, Measuring, and Assessing
When: June 17, 2021 at 2 pm EST 
About the Webinar: Exposures to high-level impulsive noises such as collisions of objects, firearms, or explosions significantly increase the risk for developing noise-induced hearing loss. Understanding technological limitations and learning about specific techniques for capturing and measuring impulse noise can result in more accurate and repeatable data.
Presenter: Donald Finan, Ph.D.

Call for Nominations 2022 Safe-in-Sound Excellence in Hearing Loss Prevention Awards™

Posted: May 5, 2021

Do you work with or for a company that has adopted a “no tolerance” attitude toward occupational hearing loss (OHL)? Has it developed innovative approaches towards OHL prevention? If so, that organization may be a great candidate for a Safe-in-Sound Excellence in Hearing Loss Prevention Award™!

Nominations are now being accepted for the 2022 Safe-in-Sound™ program. The awards are presented by the National Institute for Occupational Safety and Health (NIOSH), the Council for Accreditation in Occupational Hearing Conservation (CAOHC) and NHCA to recognize excellence in hearing loss prevention and to disseminate leading edge information from successful efforts to minimize the negative effects of noise.

The deadline for third-party nominations is June 8th, 2021 and for self-nomination is July 15, 2021. Additional information is available at
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