HAZARD
Noise is one of the most common physical hazards present in the occupational setting. Inadequate hearing protection or prolonged exposure to noise can result in either temporary or permanent hearing loss. ... Machinery and equipment are the most likely sources of hazardous noise in the workplace.
ELIMINATION
In the elimination method you either add or subtract the equations to get an equation in one variable. When the coefficients of one variable are opposites you add the equations to eliminate a variable and when the coefficients of one variable are equal you subtract the equations to eliminate a variable.
ISOLATION
In health care facilities, isolation represents one of several measures that can be taken to implement in infection control: the prevention of communicable diseases from being transmitted from a patient to other patients, health care workers, and visitors, or from outsiders to a particular patient
