Noise Exposure Monitoring: When Should Your Workplace Be Testing?

Noise is part of everyday work in many industries, from construction and manufacturing to engineering, processing, and heavy industry. But repeated exposure to high noise levels can cause permanent hearing damage if the risk is not properly understood and managed.

Professional noise exposure monitoring provides businesses with real data about the sound levels workers experience during their normal tasks, helping identify high-risk activities and determine whether existing controls are providing enough protection.

At Verum Group, we provide professional workplace noise monitoring across New Zealand, the Pacific and Asia, helping organisations better understand noise exposure and protect their people.

When Should Workplace Noise Be Monitored?

Some noisy environments are obvious. Others are harder to assess because workers move between areas, equipment operates intermittently, or exposure changes throughout the day.

Noise monitoring may be particularly valuable when:

• Workers regularly use noisy machinery, tools, or equipment.

• Employees move between different tasks or work areas.

• New machinery or processes are introduced.

• Existing noise controls have changed.

• Workers need hearing protection.

• Actual daily noise exposure is unknown.

• Businesses need to check whether current controls remain effective.

WorkSafe New Zealand recommends exposure monitoring as a way to identify and assess hazardous noise risks and check whether those risks are being effectively controlled.

How Does Personal Noise Monitoring Work?

Personal noise monitoring measures a worker’s exposure throughout the day using a wearable dosimeter positioned near the hearing zone.

As workers move between tasks and work areas, monitoring can help identify:

• Which workers have the highest exposure.

• Which tasks contribute most to daily noise levels.

• Whether exposure changes throughout a shift.

• Whether further controls or hearing protection may be required.

What About Area Noise Monitoring?

While personal monitoring focuses on the worker, area noise monitoring helps businesses understand sound levels within different parts of a workplace.

It can be used to identify noisy equipment, processes, or work zones and help determine where engineering controls, isolation, or changes to work practices may be beneficial.

Using personal and area monitoring together can provide a clearer picture of both individual exposure and the wider workplace environment.

Turning Noise Monitoring Results Into Action

Noise monitoring should do more than produce a number. The results should help businesses make practical decisions about reducing exposure.

Depending on the findings, controls may include:

• Selecting quieter equipment or processes.

• Isolating noisy machinery.

• Installing acoustic barriers or enclosures.

• Improving equipment maintenance.

• Changing how long workers spend on high-noise tasks.

• Reviewing hearing protection requirements.

• Conducting ongoing monitoring as workplace conditions change.

Monitoring can also help confirm whether controls already in place are continuing to work effectively.

Protecting Hearing Before Damage Occurs

Noise-induced hearing loss is permanent. Regular occupational noise monitoring helps businesses identify risks early and protect workers’ hearing.

Verum Group provides personal and area noise monitoring across New Zealand, the Pacific and Asia. Our occupational hygiene expertise, accurate monitoring and clear reporting help organisations understand exposure and take practical steps to reduce risk.

If noise is part of your workplace, contact Verum Group to discuss a noise monitoring assessment.