OSHA has released a new Safety and Health Information Bulletin (SHIB) on Hearing Protector Fit Testing (HPFT): Ensuring Appropriate Noise Protection at Work. If you have employees working around loud equipment, machinery, or tools, this update is worth a few minutes of your time.
Hearing protection devices (earplugs, earmuffs, and similar gear) only work if they fit correctly. Most workplaces select hearing protection based on a product's Noise Reduction Rating (NRR), a lab-derived number that estimates how much noise a device blocks. The problem is that the NRR is measured under ideal conditions. In a real workplace, with real workers inserting earplugs quickly or incorrectly, the actual protection delivered is often much lower.
Hearing Protector Fit Testing (HPFT) closes that gap. It measures the actual noise reduction a specific device provides for a specific worker, producing a Personal Attenuation Rating (PAR). The PAR reflects what is actually happening in that worker's ears, not a lab average.
Approximately 20% of workers in high-noise industries suffer from noise-induced hearing loss (OSHA, 2026). Hearing loss is permanent. HPFT gives employers a practical, proven tool to verify that workers are genuinely protected, not just equipped.
OSHA is clear that HPFT is not a new requirement. It does not change existing regulations or create new legal obligations. But OSHA is actively encouraging all employers with noise-exposed workers to add HPFT to their hearing conservation programs.
Notably, OSHA has adopted HPFT as part of its own Field Safety and Health Management System for OSHA employees. That signal matters. When an agency implements a practice for its own workforce, it reflects genuine confidence in that tool.
OSHA also confirms that employers can use HPFT as a training tool to help meet the training requirements under the Occupational Noise Exposure Standard (29 CFR 1910.95).
If your workers are regularly exposed to noise levels at or above 85 decibels, HPFT is relevant to your operation. That covers a wide range of Delaware industries:
If workers in these environments have never had a hearing protector fit test, you do not know how much protection they are actually getting.
HPFT is not paperwork. It is a practical training and verification tool that helps workers select the right hearing protection, learn to insert it correctly, and confirm it is working. OSHA is recommending it. The technology is available and accessible. And the cost of noise-induced hearing loss, to your workers and your business, is real.
For more information, visit OSHA's Occupational Noise Exposure Safety and Health Topics page at osha.gov.
If you have questions about your hearing conservation program or want expert guidance on protecting your workers, SafeDE offers free, confidential on-site consultations for Delaware businesses.
Schedule your free consultation: worksafe.delaware.gov/consultation