Say what? Developing a hearing conservation program
A look at the latest OSHA violation data shows citations related to the occupational noise exposure standard range from lack of a hearing conservation program to a lack of training. OSHA expects employers to reduce employee exposures to hazardous noise levels through the use of feasible engineering and administrative controls. A hearing conservation program is required if these controls don’t adequately reduce exposures.
OSHA’s 1910.95 standard sets the requirements for occupational noise exposure. Employers must implement a hearing conservation program when employees are exposed to 85 or more decibels (dB) averaged over an eight-hour period. The program includes:
- noise monitoring,
- hearing tests,
- hearing protection devices,
- an annual training program, and
- recordkeeping.
Noise monitoring
Employers must monitor all employees whose noise exposure is equivalent to or greater than a noise exposure received in 8 hours where the noise level is constantly 85 dB. The exposure measurement must include all continuous, intermittent, and impulsive noise within an 80 dB to 130 dB range and must be taken during a typical work situation.
Monitoring must be repeated whenever changes in production, process, or controls increase noise exposure. These changes may mean that more employees need to be included in the program or that their hearing protectors may no longer provide adequate protection.
Monitoring is commonly conducted by using sound level meters and dosimeters worn by employees. Employees must be able to observe the monitoring and those who are exposed at or above an 8-hour TWA of 85 dB must be given the results of the monitoring.
Hearing tests
Employers must provide affected employees with hearing tests in order to monitor employees for a standard threshold shift (STS) and to know if the hearing conservation program is effective.
Affected employees first have a baseline audiogram either prior to beginning work with the company or changing jobs to one affected by the hearing conservation requirement. This is followed up with annual audiograms. If tests show the employee has evidence of an STS relative to the baseline audiogram, additional testing or examinations may be necessary.
Hearing protection devices (HPDs)
HPDs must be available (at no cost) to any employee exposed at or above the 8-hour TWA of 85 dB and are required for employees who are exposed to the 8-hour TWA exceeds 90 dB. Employees must be able to select HPDs from a variety of suitable choices.
Training
Training must be provided annually on:
- The effects of noise on hearing;
- The purpose, advantages, and disadvantages of various types of hearing protectors;
- The selection, fit, use, and care of protectors; and
- The purpose and procedures of audiometric testing.
Information provided in the training program must be updated to be consistent with changes in protective equipment and work processes.
Recordkeeping
Employers must keep noise exposure measurement records for two years and maintain records of audiometric test results for the duration of the affected employee’s employment. Audiometric test records must include the employee’s name and job classification, date, examiner’s name, date of the last acoustic or exhaustive calibration, measurements of the background sound pressure levels in audiometric test rooms, and the employee’s most recent noise exposure measurement.
Key to remember
If workers are exposed to excessive noise in the workplace, employers must implement feasible engineering or administrative controls to eliminate or reduce hazardous levels of noise. Where controls are not sufficient, employers must implement an effective hearing conservation program.