Evaluating Your Current Hearing Conservation Program

Most hearing conservation programs don't fail because nobody set one up. They fail because a program built five years ago quietly drifts out of compliance: a new production line raises noise levels nobody remeasured, an audiogram date slips past 12 months, or the annual training covers three of the four required topics instead of all four. An honest audit against OSHA's actual requirements catches that drift before an inspector does.

What does OSHA actually require in a hearing conservation program?

Under 29 CFR 1910.95, once employee noise exposure reaches an 8-hour time-weighted average of 85 decibels, the action level, an employer must implement a hearing conservation program with six required elements: noise monitoring, audiometric testing, hearing protection devices provided at no cost, annual employee training, recordkeeping, and employee access to exposure and audiogram records. All six have to function together and stay current. A program that has hearing protection on the shelf but hasn't repeated noise monitoring after a new machine was installed, or that has audiograms on file but no annual training record, is not actually compliant even though most of the pieces exist somewhere in a file cabinet.

How do you audit each element?

Element	What to check	Common gap
Noise monitoring	Current dosimetry or sound level survey covering all work areas and shifts; repeated after process or equipment changes	Survey is years old and doesn't reflect a new line or added equipment
Audiometric testing	Baseline audiogram within 6 months of enrollment; annual audiogram for every enrolled employee within 12 months of the last	Annual audiograms run late or skipped for employees who changed shifts or locations
Hearing protection	Variety of protectors available at no cost; attenuation adequate for measured exposure levels	Only one style stocked, no fit check for employees it doesn't fit well
Annual training	Covers all four required topics: effects of noise on hearing, purpose of protectors, selection/fit/care of protectors, purpose of audiometric testing	Training covers protector use but skips the audiometric testing purpose section
Recordkeeping	Noise exposure records kept 2 years; audiometric test records kept for the duration of employment	Audiogram records purged or lost during a records migration
Employee access	Employees and their representatives can request their own exposure and audiogram records	No documented process for an employee to request their own records

What is the most commonly cited gap?

Audiometric testing gaps are consistently the most common finding in hearing conservation inspections, specifically enrolled employees who haven't had an annual audiogram within 12 months of their previous one, or new hires missing a baseline audiogram entirely. This happens most often with employees who transfer between departments or shifts, because the annual test date gets tracked at the department level instead of following the individual employee. An audit should pull a full roster of everyone in the hearing conservation program and check each person's last audiogram date individually, not rely on a department-level testing schedule that assumes everyone got covered.

What does a standard threshold shift mean for your program?

A standard threshold shift, or STS, is a change in hearing of an average of 10 decibels or more at 2000, 3000, and 4000 Hz in either ear compared to the baseline audiogram, adjusted for age. When an STS is identified, the employer must notify the employee in writing within 21 days, and if the shift is work related, take corrective steps such as refitting hearing protection, retraining, or referring the employee for further evaluation. An audit should confirm that every audiogram is actually being compared against baseline for an STS, not just filed after the test, since a missed STS means a preventable hearing loss goes unaddressed.

How Foster approaches a hearing conservation program audit

When we run mobile audiometric testing for a client, we don't just administer the test and hand back a stack of results. We check each employee's testing history against the 12-month annual requirement before we show up, flag anyone missing a baseline, and note when an STS appears on an individual audiogram so it doesn't get lost in a batch report. For clients who want a full program review rather than just the annual test, we walk through all six required elements against their actual records, not against what the program looked like on paper when it was first written. The gap we find most often is exactly what OSHA's own inspection data shows: audiograms that slipped past 12 months for employees who changed roles mid year.

Frequently asked questions

At what noise level does a hearing conservation program become mandatory?

A hearing conservation program is required once employee noise exposure reaches an 8-hour time-weighted average of 85 decibels, OSHA's action level under 29 CFR 1910.95, even though the permissible exposure limit for engineering controls is 90 decibels.

How often does an enrolled employee need an audiogram?

Annually, within 12 months of the previous audiogram, following a baseline audiogram taken within 6 months of the employee's enrollment in the program.

What counts as a standard threshold shift?

An average shift of 10 decibels or more at 2000, 3000, and 4000 Hz in either ear compared to the baseline, adjusted for the employee's age.

How long do audiometric test records need to be kept?

For the duration of the employee's employment, while noise exposure measurement records only need to be retained for 2 years.

Does hearing protection alone satisfy the requirement, without testing or training?

No. All six elements, noise monitoring, audiometric testing, hearing protection, annual training, recordkeeping, and employee access to records, are required together. Hearing protection without testing and training does not meet the standard.

Foster Special Instruments provides on-site audiometric testing and audiometer calibration for employers running a hearing conservation program, plus mobile testing for multi-shift facilities. Related reading: the eight training topics 1910.95(k) requires annually. Need a program audit? Request a quote.

Sources

• 29 CFR 1910.95: Occupational noise exposure (OSHA)
• 29 CFR 1910.95 full text (eCFR)
• Council for Accreditation in Occupational Hearing Conservation (CAOHC)