Sert-A-Plug’s John Matthew Johnson was featured in the latest edition of NHCA Spectrum as part of its Member Spotlight series. The feature highlights John’s work in hearing loss prevention, his advocacy for hearing protection fit testing, and the continued momentum behind Sert-A-Plug as the team pursues additional occupational PAR study sites and licensing opportunities. Featured…
Read More
J3 Group LLC member John Matthew Johnson was elected February 2026 to serve a two year term on the National Hearing Conservation Executive Council (E.C). Mr. Johnson is honored to act as E.C. Member-at-Large alongside Kristy Deiters, Au.D./Stephenson & Stephenson (SASRAC).
J3 Group LLC proudly exhibited their poster detailing the results of their Sert-A-Plug Personal Attenuation Rating study at the 2026 National Hearing Conference Association (NHCA) Annual Conference in February. NHCA celebrated their Golden 50th anniversary with a well attended gala in Fort Worth, Texas with product exhibits, oral presentations, and topical workshops celebrating the advancement…
Read More
Founders John Johnson and Mark Anderson on the “Hearing is Quality of Life” series hosted by the National Hearing Conservation Association. Watch the video below. You can also watch others in the series on their site.
We are excited to announce that J3 Group LLC will soon undertake a product research study for Sert-A-Plug to establish our products performance capabilities. We are proud to be collaborating with former NIOSH research scientist Chucri (Chuck) A. Kardous who is designing a product study to document Sert-A-Plug’s performance and the personal attenuation rating (PAR)…
Read More
We are pleased to announce the publication of the National Institute for Occupational Safety and Health (NIOSH) Revised Science Policy for determining the attenuation of hearing protection devices. Individual Fit-Testing Recommendation for Hearing Protection Devices is an update to the 1998 NIOSH Criteria for a Recommended Standard – Occupational Noise Exposure. The 1998 criteria document stated that “ideally,…
Read More
Siletz Tribal members John Johnson (Tribal elder) and son Shawn Johnson, J3 group LLC, were in Siletz in early April to perform a Personal Attenuation Rating (PAR) fit testing study for their hearing protector device – Sert-A-Plug (SAP) – that fits foam earplugs directly into the user’s ear canals. Siletz Tribal members participated in the…
Read More
The J3 Group, a Confederated Tribes of Siletz Indians (CTSI) Tribal member-owned company, is partnering with researchers from the federal government, academia and industry to conduct safety and health research and intervention in our community. J3 Group conducted a hearing protection fit-test study to evaluate the effectiveness of their patented Sert-A-Plug (SAP) insertion tool in…
Read More
We are proud and honored to announce that the National Occupational Research Agency (NORA) Council has added our J3 Group LLC Founder/CEO John Matthew Johnson as a member of the NORA Hearing Loss Prevention Cross-sector Council. NORA sets the occupational safety and health research agenda for the United States. Mr. Johnson will be researching occupational…
Read More
