Workplace Noise and Hearing Protection in Canada

Excessive noise can damage hearing gradually, and a worker may not notice the change until harm has occurred. Employers need to identify noisy work, assess exposure, reduce it where practicable and make sure any hearing protection is suitable. The legal details depend on the province, territory or federal jurisdiction. There is no single national workplace noise rule that can safely be applied to every Canadian site.

This guide explains the management sequence using Ontario and British Columbia as examples. The CCOHS comparison of occupational noise limits shows why a site must check its own regulator: the exposure criteria, exchange rates and program requirements can differ. The existing provincial OHS guide helps identify the relevant regime.

Identify noisy work before choosing PPE

Walk the site and ask where voices need to be raised, machines run for long periods, tools create impact noise or workers move among several noisy tasks. Include maintenance, cleaning and intermittent work. A worker's daily exposure can differ from a single sound reading at a machine. Changes in production speed, enclosures, equipment condition or staffing can alter the pattern.

Consult workers about the times and places where noise is most intrusive. Review complaints, audiometric information where lawfully available, and task records. Do not treat a phone sound-level app as a compliance measurement. When exposure needs to be determined, use a competent assessment method and the local regulator's requirements. CCOHS measurement guidance explains the distinction between sound-level measurement and a worker's exposure over time.

Record the equipment, task duration and operating conditions, then compare them with the applicable local limit. A site operating across provinces may need separate legal comparisons even where it uses one practical noise-control programme. Sector-specific regulations can add details, so check mining, construction or other rules relevant to the work.

Ontario's rule is specific to Ontario

Ontario Regulation 381/15 requires employers to take measures reasonably necessary to protect workers from hazardous sound levels. It sets an equivalent eight-hour exposure limit of 85 dBA, Lex,8. The regulation calls for engineering controls and work practices, and generally requires protection without relying on hearing protectors where the limit would otherwise be exceeded, subject to specified exceptions. Its text also deals with warning signs, worker training and device selection.

Do not turn the 85 dBA Ontario value into a universal Canadian number or a simple instant-reading trigger. The limit is an equivalent exposure measure over an eight-hour reference period. The Ontario regulator's guide explains how the regulation operates. For a real workplace decision, consult the regulation, assess exposure correctly and document why the selected controls meet it.

Under the Ontario rule, when a hearing protection device is supplied, the employer must train the worker in its care and use, including limitations, fitting, inspection and maintenance. The device should be selected with regard to the sound exposure, attenuation and manufacturer information. A box of earplugs in a cupboard does not establish that the device is suitable or used effectively.

British Columbia uses its own Part 7 rules

British Columbia's OHS Regulation Part 7 addresses noise exposure, measurement, controls, hearing protection and hearing conservation. Read the current Part 7 provisions and WorkSafeBC guidance for the site. Even where a numerical value resembles Ontario's, the procedure, definitions and program duties can differ. A company should not copy an Ontario compliance statement onto a BC assessment.

The practical control hierarchy remains useful: reduce noise at source, reduce transmission, change work organisation where appropriate, and provide suitable hearing protection for residual exposure or as local law requires. A BC hearing-conservation programme may include elements beyond simply issuing PPE. Confirm the triggers and details from the current BC regulation.

Control noise at the source

Look first at maintenance, substitution, isolation, enclosures, damping and quieter processes. A rattling machine may be louder because of wear. A noisy task may be moved away from other workers. An enclosure may help if it remains closed during normal work. Review whether a proposed control creates another hazard, such as impaired communication or poor ventilation.

Work practices can reduce exposure duration or the number of people exposed, but a rotation plan needs to account for all noisy tasks in a worker's day. Do not use a paper schedule as proof of exposure if people routinely cover additional jobs. Measure or estimate exposure using a suitable method when required, then verify whether the control changed it.

Workers should know which areas and tasks require protection and what to do when a control is damaged. Supervisors need authority to stop a high-exposure task when protection is unavailable. A sign can communicate a requirement, but it cannot substitute for the reduction of noise at source or an assessment of the remaining exposure.

Select and maintain hearing protection

Hearing protectors must fit the worker and the exposure. Consider the device's rated attenuation, compatibility with other PPE, comfort, communication and the manufacturer's instructions. Too little attenuation leaves a hazard; a device that workers repeatedly remove because it prevents necessary communication can also fail in practice. Training should include fitting, inspection, storage, cleaning or replacement and the limits of protection.

Provide a practical route for someone who cannot use the standard device. A different size or type may be needed. Review use in real conditions, including heat, helmets, eyewear and tasks requiring verbal warnings. Do not assume a manufacturer's laboratory rating is the exact reduction achieved by every worker during every shift.

Where a hearing-conservation or audiometric programme is required, obtain competent occupational-health advice and follow the specific jurisdiction's rules. Medical results are sensitive. The employer needs the information necessary to manage exposure and act on programme feedback, while individual clinical information should be handled appropriately.

Review after change

Repeat the assessment after a new machine, process change, higher production rate, changed layout, worker complaint or evidence a control is failing. Compare the new exposure with the local limit using the required method. Check that engineering controls are maintained, work practices are real and hearing protectors still suit the task. Record corrective action, not just a measurement.

For a broader view of jurisdiction-specific obligations, use the Canada OHS provincial guide. To evaluate software for general OHS administration, see Complys Canada OHS software. Confirm any desired function directly.