🔊 Noise & Hearing Conservation
Free OSHA 1910.95 noise & hearing conservation training with a completion certificate.
Last updated: June 2026
Master OSHA 29 CFR 1910.95 — the 90 dBA PEL, the 85 dBA action level, the 5 dB exchange rate, the 8-hour TWA and noise dose, the hierarchy of noise controls, hearing protection and the NRR, audiometric testing and the standard threshold shift, and how to prevent permanent noise-induced hearing loss. The course is organized into 7 modules, ending with a final exam (pass mark 80%). It is free awareness-level training designed for anyone who needs a practical, working understanding of the topic.
What you'll learn
- How loud is too loud? Common noise levels
- How hearing works & why NIHL is 100% preventable
- OSHA limits, the 5 dB rule, TWA & noise dose
- Control noise at the source: the hierarchy
- Choosing & fitting hearing protection (the NRR)
- The hearing conservation program & audiometric testing
- Training, signage & worker rights
Learning objectives
- State the OSHA 90 dBA PEL and 85 dBA action level over an 8-hour day
- Apply the 5 dB exchange rate and calculate an 8-hour TWA and percent noise dose
- Explain how loud noise destroys cochlear hair cells and causes permanent, painless noise-induced hearing loss (NIHL)
- Rank noise controls using the hierarchy of controls, engineering before PPE
- Select and correctly fit earplugs and earmuffs, and de-rate the NRR for real-world attenuation
- Describe every element of a hearing conservation program: monitoring, audiometric testing, the standard threshold shift, training and recordkeeping