Workplace Noise Assessment and When You Need One

A workplace noise assessment helps determine how much noise workers are exposed to during the job and whether that exposure needs better control. Loud equipment is an obvious warning sign, but noise exposure depends on both the sound level and how long you spend around it.

Testing turns “this seems loud” into information you can use.

When Is a Workplace Noise Assessment Needed?

A workplace noise assessment is needed when workers are regularly exposed to loud equipment, machinery or processes, and the level of exposure is uncertain. Measurements can establish how much noise workers receive over a shift, identify high-noise areas and help determine whether engineering controls, work practices or hearing protection are required. (Ontario guidance)

How Is Workplace Noise Exposure Measured?

Noise can be measured in different ways depending on the question being asked.

A sound-level meter measures noise at a particular location or from a specific source. A personal noise dosimeter worn by the worker records exposure over time, helping show the total noise dose across a workday.

Our occupational hygiene service includes both full-shift noise dosimetry and area sound-level surveys. (Occupational and industrial hygiene services)

What Can a Noise Assessment Tell You?

A noise assessment can show which tasks, equipment, or locations contribute most to worker exposure.

That matters because workers rarely spend an entire shift standing beside one machine. You may move between quieter and louder areas, operate several pieces of equipment, or experience short periods of intense noise.

In Ontario, for instance, the occupational exposure limit is 85 dBA averaged over an eight-hour workday. Other jurisdictions can have their own requirements, so results need to be interpreted against the rules that apply to the workplace.

What Happens After Workplace Noise Testing?

If noise exposure is too high, the next step is reducing it.

Controls can include quieter equipment, enclosing or isolating noisy machinery, maintaining equipment, changing work practices or limiting exposure time. Hearing protection can also form part of the control strategy.

Ontario’s noise requirements emphasize reducing exposure through engineering controls and work practices before relying solely on hearing protection.

Measure the Noise Before You Get Used to It

A loud workplace can start to feel normal surprisingly quickly. That does not mean the exposure is acceptable.

Measuring noise helps you understand where the risk is coming from and choose controls based on evidence rather than how loud the workplace feels.

Take Action

If workers regularly have to raise their voices, work around noisy machinery, or wear hearing protection, it is worth understanding the exposure more clearly.

Learn more about our occupational and industrial hygiene services for noise surveys, dosimetry, and hearing-conservation support.

Learn more about workplace hazards and occupational hygiene by reading our free resource, Occupational Hygiene: A Practical Guide to Identifying and Controlling Workplace Health Hazards.

If you have concerns about workplace noise, talk to an expert about the next practical step.

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