16 Worker Noise – OSHA Noise Testing

Measuring worker noise exposure is the most important part of a workplace hearing conservation and noise control program. It helps identify work locations where there are noise problems.  It identified who may be affected and where noise mitigation should be applied.

OSHA (Occupational Safety and Health Administration) noise exposure testing is conducted by putting a dosimeter on a worker during their entire work day.  The noise exposure is then computed.

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12 Office Building Roof Top Mechanical Equipment Noise

Noise Expert (acoustical engineers) was asked to evaluate the mechanical noise from a rooftop HVAC system located directly above an open office space in Chandler, Arizona.

The low frequency noise levels were very high in the office spaces below the roof top unit.  The ductwork takes an abrupt 90 degree turn under the roof in duct that is too small for the volume of air being moved.  Hence, the air velocities are very high and cause low frequency rumble.

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