The inner ear responds differently to various frequencies (some frequencies sound louder and some quieter).

Noise is unwanted sound that can be irritating and damaging.

The difference between a JHA and a JSA is that a JHA is for high hazard industries and a JSA is for “safer” industries. 

Decibel = 20 * log (P / P0). The P0 term in this formula refers to:

A company does not have to perform a hazard assessment, like a JSA/JHA, to determine which PPE is required for a given job/task if they simply require all employees to use PPE at all times as a condition of employment.

Confined space entry begins when an employee fully enters the confined space.

In regard to exposure of blades, when the blades of a fan are less than seven feet above the ground the blades shall be guarded.

Affected employees are trained to perform lockout/tagout.

DART _______ DAFWI

It is good practice to use emergency stops (E-Stops) to lockout a machine as they effectively stop the machine from running.