Why Should My Staff Use Sert-A-Plug?
Foam earplugs used in US industry typically carry Noise Reduction Ratings of 29 to 33 dB. That rating assumes a deep, consistent fit, and hand insertion varies from worker to worker.
– In our study, naive manual self-insertion measured an average PAR of 17.2 dB. Inserted with Sert-A-Plug after brief instruction, the same users averaged 28.8 dB (Johnson & McCall, NHCA 2026).
– Standardized insertion turns a variable hand technique into a repeatable step staff can be trained on and document.
– NIOSH recommends individual fit testing (NIOSH 2025-104), and OSHA’s 2026 bulletin recognizes fit testing as a best practice (SHIB 02-17-2026). Sert-A-Plug works alongside fit testing, not instead of it.




