Fabricated Metal Manufacturing Has the Highest Injury Rate of Any Large Industry. Here's the Data.

Fabricated Metal Manufacturing has the highest average injury rate of any large-workforce industry in the Soundtrace dataset — 2.36% across 1,639 companies. That figure means roughly one in every 42 workers in the dataset experienced a recordable hearing loss case over nine years. Stamping, grinding, welding, and forming operations generate sustained high-intensity noise across entire shifts, and the industry’s fragmented structure — thousands of small-to-mid-size job shops rather than a handful of dominant OEMs — means program quality varies enormously.

Soundtrace analyzed nine years of OSHA ITA hearing loss data across 21,120 U.S. establishments. This is the industry-specific deep dive for Fabricated Metal Manufacturing. See the full industry rate analysis and national trend overview for context.

Industry Hearing Loss Profile

Fabricated Metal’s 2.36% average injury rate is the highest among industries with more than 500 companies in the dataset. The industry’s structure creates specific compliance challenges: most fabricated metal operations are independent job shops or mid-size Tier 2/3 suppliers, not large OEMs with mature EHS departments. Programs are often minimal, outdated, or entirely absent at smaller operations.

The Noise Environment

The 2016–2024 Trend

Fabricated Metal shows pre-pandemic growth to a 2019 peak, a sharp COVID detection gap in 2020, and a strong post-pandemic recovery — but notably, the 2022–2024 figures have plateaued rather than continued climbing. This is one of the few industries in the dataset where the post-COVID surge appears to have stabilized rather than set new records.

Where Programs Break Down

Program failures in Fabricated Metal cluster around three patterns: outdated noise monitoring that predates current equipment, inadequate attenuation in high-impact stamping and grinding zones, and STS follow-up delays in operations where the safety manager wears multiple hats.

• Update noise surveys after any equipment addition or process change. Job shops frequently add machines or modify production layouts without triggering a monitoring update. The enrollment population should reflect current noise exposure, not a survey from three years ago.
• Specify HPDs by noise zone. Standard foam earplugs provide inadequate attenuation in stamping operations exceeding 100 dBA. Zone-specific HPD selection with documented attenuation adequacy calculations is required.
• Automate STS detection. In operations where the safety function is shared with production management, manual audiogram review creates delays that push employers past the 21-day notification window.

What Strong Looks Like Here

• In-house testing over mobile van scheduling. Continuous facility-based testing eliminates annual coverage gaps and captures threshold shifts within weeks rather than months of occurrence.
• Noise zone mapping updated with every equipment change. Process modifications, equipment upgrades, and layout changes alter the facility noise map. Monitoring currency is a compliance requirement, not a one-time exercise.
• Hearing protection specified by noise zone, not blanket policy. Attenuation adequacy must be verified against measured exposures. A single facility-wide HPD policy routinely leaves the highest-exposure workers inadequately protected.
• Automated STS detection with professional supervisor review. Manual STS calculation at scale is error-prone. Automated flagging with audiologist review is the only operationally viable approach for programs with more than 50 enrolled workers.
• Employer-controlled recordkeeping that survives vendor changes. Cloud-based audiometric records owned by the employer ensure continuity and support workers’ compensation defense across the employment lifecycle.

Frequently Asked Questions