Use of Sound Level Meters Toolbox Talk

Noise can be hard to judge by ear. A saw, grinder, compressor, generator, jackhammer, pump, or piece of heavy equipment may seem normal to the crew, but the sound level can still be high enough to damage hearing or block important warnings.

This talk focuses on using sound level meters to check jobsite noise levels. The goal is to identify high-noise areas, confirm when hearing protection is needed, and adjust the work plan before noise exposure becomes unsafe.

Why This Matters

• Sound level meters help remove guesswork when deciding if noise controls are needed.
• Noise levels can change when more tools start, work moves indoors, or equipment runs closer to the crew.
• Measured noise levels help supervisors choose hearing protection, signs, barriers, quiet zones, and work rotation.
• High noise can make it harder to hear alarms, horns, radios, spotters, and emergency instructions.
• Checking noise levels supports hearing conservation and helps prevent permanent hearing loss.

Common Hazards

• Assuming noise is acceptable because the task is short or familiar.
• Taking readings too far from the worker’s position and missing the actual exposure level.
• Measuring only one tool when several tools, generators, compressors, or vehicles are running nearby.
• Using a meter with a low battery, damaged microphone, wrong setting, or no calibration check.
• Failing to recheck noise after work moves into stairwells, shafts, tunnels, mechanical rooms, or other enclosed spaces.
• Ignoring noise from backup alarms, pumps, ventilation fans, compactors, and idling equipment.
• Letting workers enter high-noise areas before readings are reviewed and controls are in place.
• Wind, rain, dust, or equipment vibration affecting the meter reading if the meter is not protected or positioned correctly.

Safety Checklist

Before Work Begins

• Identify tasks and equipment that may need sound level checks, including cutting, grinding, chipping, drilling, compacting, demolition, and generator use.
• Make sure the sound level meter is charged, undamaged, and ready for use.
• Check that the microphone, windscreen, display, buttons, and settings are in good condition.
• Confirm who is responsible for taking readings and sharing results with the crew.
• Review where workers will stand during the task so readings are taken near actual exposure points.
• Have hearing protection, signs, cones, barriers, or other controls ready before loud work starts.

During Work

• Take readings near the worker’s ear level or normal work position when it is safe to do so.
• Measure during normal operation, not just during startup or when the tool is running lightly.
• Recheck levels when more equipment starts, the task moves, the crew enters an enclosed space, or conditions change.
• Compare readings to the site noise plan or company hearing protection requirements.
• Mark high-noise areas and tell the crew what hearing protection or controls are required.
• Keep the meter out of the line of fire, moving equipment paths, pinch points, and areas where it could distract the operator.
• Record or report readings according to the site procedure so the information can be used for future planning.

Crew Talking Points

• Which tasks or equipment should be checked with a sound level meter today?
• Where do workers stand closest to the noise source during the task?
• Are we working in an enclosed area where noise may be louder than expected?
• What controls will we use if readings show high noise levels?
• How will the crew know when hearing protection is required or when a high-noise area changes?
• Does anyone have a question or concern about noise readings, hearing protection, or communication before work starts?

Stop Work If

• Noise appears high and no reading, control, or hearing protection plan has been established.
• The sound level meter is damaged, not working, or being used in a way that gives unreliable readings.
• Workers are exposed to high noise before signs, barriers, hearing protection, or communication controls are in place.
• Noise prevents workers from hearing alarms, radios, spotters, horns, or stop signals.
• Readings are higher than expected and the current controls may not be enough.
• The person taking readings must stand in an unsafe location near moving equipment, falling objects, energized work, or other hazards.

Final Reminder

Do not guess at noise levels when the risk is unclear. Use the meter, share the results, and put controls in place before loud work continues.