Many worksites have a variety of sounds from the operation of equipment and machines. Workers should be able to distinguish between “normal” sounds of noise and sounds of danger.

According to OSHA, there are over two million workers injured each year in the United States because workers fail to identify sounds of hazard. Workers should become acquainted with the sounds of equipment and machines operating in the work area.

Discussion Points:

  • Become acquainted with sounds of equipment and machines operating in the work area
  • Be able to identify sounds of hazard
  • Be aware of warning signals and alarms
  • Do not ignore sounds of hazard or warning signals
  • Use a Warning Signal Checklist to protect employees from serious injury


What is the sound of equipment and machines used in your work area?

Can you identify “normal” sounds and detect changes in tone and pitch?

What is the sound level of noise? Are you able to hear co-workers or supervisors speak to you?

Are you able to hear and understand different warning signals? Do you know what actions to take when you hear a warning signal?

Your safety could depend on your ability to identify unusual sounds, sounds of danger, and the ability to communicate with co-workers or a supervisor. The sounds you hear can be the result of equipment, tools, machines, and vehicles used by workers, or warning signals, announcements over the PA system, people talking, or sounds of inclement weather.

Workers should be able to hear warning signals and verbal directions from co-workers and supervisors. Training must include what actions to take when they hear the signals. It is recommended that the company have a safety policy with a Warning Signal Checklist.

This checklist should address hazards, assessments, training, guidelines, and instructions for employees and visitors. The instructions should include the meaning of warning signals, and descriptions of actions to be taken. The company should have a well-developed emergency response plan and safety policy, a Warning Signal Checklist, and regularly scheduled training sessions. It’s vital that the company protect its employees from unnecessary risks, potential hazards, and serious injuries.

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