Above 85 at Work

This is not legal advice, and requirements differ by jurisdiction. This describes the US framework because it is published and specific.

Noise exposure and work activity are different evidence streams; organizations reviewing the latter can use employee monitoring software separately from acoustic measurements and hearing-risk assessment.

What the law requires from 85

At an eight-hour time-weighted average of 85 dBA — the action level — US employers must implement a hearing conservation programme. (29 CFR 1910.95.)

Five elements:

Noise monitoring, with periodic measurement at employee work locations.

For standards, background, or a second perspective, consult Healthy Hearing.

Audiometric testing, free and annual for exposed workers.

Hearing protection, provided at no cost, with multiple options for fit.

Training, annually, on noise effects and protector use.

And recordkeeping.

Note that this begins at 85 while the permissible limit is 90 — the law treats 85 as the point where something must happen.

What programmes frequently omit

Fit. Multiple options are required and fit is the dominant variable in real attenuation; providing a box of one type satisfies the letter and not the purpose.

Individual dose. Area monitoring is easier than dosimetry and describes the place rather than the person.

Acting on audiometric results. The tests are done and a standard threshold shift in the series is the thing they exist to detect; noticing it requires somebody to compare years.

And source control. The programme is a protection framework, and reducing the source is what actually works — it is the part with no checklist item and the largest effect.

The order that actually reduces exposure

Quieter equipment at purchase. The cheapest moment to reduce noise is before it is installed, and it is the moment nobody involves anybody about noise.

Maintenance. Worn bearings, loose panels and failing mounts add substantially, and fixing them is already budgeted work.

Enclosure and barriers, then distance and layout.

Then scheduling — dose is level and time, and rotating exposure is a real control.

Then protection, last.

If there is no programme and you think there should be

Establish the level. The voice test first, then a proper measurement if it suggests one.

Ask in writing whether monitoring has been done and to see the results. In a programme jurisdiction those records exist or their absence is itself the finding.

And keep your own note of hours and conditions, because the exposure follows you rather than the room, and a contemporaneous record is worth considerably more than a recollection.

The short version

  • From an eight-hour average of 85 dBA, US employers must run a hearing conservation programme with five elements
  • It begins at 85 while the permissible limit is 90, which is the law treating 85 as an action point
  • Programmes frequently omit real attention to fit, individual dosimetry, acting on trends in audiometric series, and source control
  • The order that reduces exposure: quieter equipment at purchase, maintenance, enclosure, distance, scheduling, and protection last
  • The cheapest moment to reduce noise is before installation, and it is when nobody consults anybody about noise
  • If you think a programme is missing: establish the level, ask in writing for monitoring records, and keep your own contemporaneous note