Sheet metal workers in HVAC fabrication, ductwork installation, and architectural metalwork face noise exposure from plasma cutters, power shears, press brakes, roll formers, and the distinctive impact noise of hand forming and hammering metal sheet. The CDC estimates 22 million U.S. workers face hazardous occupational noise each year, and sheet metal workers — particularly those in fabrication shops and mechanical contractors — are a high-exposure segment of that population.
Soundtrace provides automated audiometric testing, noise monitoring, and HPD fit testing for sheet metal contractors and fabrication shops.
Are Sheet Metal Workers at Risk of Hearing Loss?
Yes — sheet metal workers work in environments where shears, brakes, plasma cutters, spot welders, and riveting operations regularly produce noise levels of 90–108 dBA. Sustained exposure at these levels causes permanent, irreversible noise-induced hearing loss (NIHL). OSHA requires employers to enroll workers whose 8-hour TWA meets or exceeds 85 dBA in a hearing conservation program.
How Common Is Hearing Loss Among Sheet Metal Workers?
The CDC estimates 22 million U.S. workers face hazardous occupational noise each year, and sheet metal workers are a meaningful segment of that population. Many sheet metal workers develop a characteristic 4,000 Hz notch on audiometry within the first decade of unprotected exposure — often before they notice any functional hearing difficulty. Without annual audiometric testing, that early damage goes undetected until it has progressed significantly.
What Should Employers Do to Protect Sheet Metal Workers’ Hearing?
Employers must implement a complete hearing conservation program including noise monitoring to document each worker’s TWA, baseline and annual audiograms to detect standard threshold shift, hearing protection fit testing to verify actual attenuation, and annual training. Documentation from day one of employment protects both workers and employers.
Can Sheet Metal Workers File Workers’ Compensation Claims for Hearing Loss?
Yes. Occupational hearing loss is compensable in all 50 U.S. states. Workers’ compensation claims for hearing loss are routinely filed years or decades after the exposure period. Employers with a documented pre-employment audiogram are far better positioned to defend against or apportion these claims.
Sheet metal fabrication operations in general industry fall under 29 CFR 1910.95. When any worker's 8-hour TWA meets or exceeds 85 dBA, the employer must implement a full hearing conservation program. Most sheet metal fabrication environments exceed this threshold.
Measured Noise Levels for Sheet Metal Operations
| Sheet Metal Task | Typical Noise Level | OSHA Max Duration |
|---|---|---|
| Plasma cutter | 95–110 dBA | Under 2 hours |
| Power shear / guillotine shear | 88–96 dBA | 2–4 hours |
| Press brake | 88–98 dBA | 2–4 hours |
| Roll former | 90–98 dBA | 2–4 hours |
| Pittsburgh seam hammer | 100–112 dBA | Under 1 hour |
| Snips / hand tools | 82–88 dBA | 4–8 hours |
| Shop ambient (multiple operations) | 86–94 dBA | 2–4 hours |
The Pittsburgh seam operation — using a mallet or hammer to lock seams on ductwork sections — generates high-impulse noise peaks, similar in character to press operations. Workers performing Pittsburgh seam work for extended periods face impulse trauma on top of ambient TWA exposure.
STS Risk Factors for Sheet Metal Workers
Sheet metal workers who transition between fabrication shop work and field installation experience variable noise environments that are difficult to characterize with area monitoring alone. Personal dosimetry — measuring individual worker TWA across a full shift — is the appropriate method under OSHA 1910.95 for workers with variable exposure profiles.
A sheet metal apprentice who spends 3 years without a documented baseline, rotating between plasma cutting, press brake work, and field installation, arrives at journeyman status with years of untracked cochlear dose and no audiometric baseline for their employer to rely on.
See: Noise-Induced Hearing Loss: The Employer's Complete Guide and Workers' Compensation for Occupational Hearing Loss
Frequently Asked Questions
Yes. Sheet metal fabrication operations including plasma cutting, press brakes, roll formers, and Pittsburgh seam hammering routinely produce noise at or above OSHA's 85 dBA action level. Sheet metal workers who work without hearing protection across a career face significant cumulative cochlear damage risk.
Yes. Sheet metal fabrication operations in general industry fall under 29 CFR 1910.95. When any worker's 8-hour TWA meets or exceeds 85 dBA, the employer must implement a hearing conservation program including audiometric testing, hearing protection, training, and recordkeeping.
Pittsburgh seam hammering and plasma cutting are typically the highest-noise operations in sheet metal work. Pittsburgh seam operations can produce impulse levels of 100–112 dBA per hammer strike. Plasma cutting generates sustained noise of 95–110 dBA at the operator position.
In-house audiometric testing for sheet metal operations
Soundtrace delivers OSHA-compliant audiometric testing and noise monitoring for sheet metal employers — automated STS detection, 30-year cloud retention, and licensed audiologist supervision.
Get a Free Quote Book a demo →- OSHA Hearing Conservation Program: Complete 1910.95 Guide
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