HRM 3400 Lecture Notes - Noise-Induced Hearing Loss, Sound Pressure, Sound Level Meter

• School: York University
• Department: Human Resources Management
• Course: HRM 3400
• Professor: all

Document Summary

Hrm 3400 winter 2012 anna blake. Lecture 3 physical agents jan 23. The basis of operations and existence depends on the principles of physics. Types of energy defined by distance, mass, and/or time. Most health effects are chronic in nature; resulting damage can take years to manifest itself. Noise: ambient all around us", wsib statistics regarding hearing loss. 1 million in compensation cost between 1995 and 2004: defined as unwanted sound". Sound is defined as the auditory sensation evoked by the oscillations in pressure in a medium with elasticity and viscosity. ": travels through air in a wave pattern called a sine wave, frequency. Wavelength the distance that one complete sine wave cycle will travel. Number of time/second that a complete sine wave is repeated. Expressed in units of hertz (hz) or cycles/sec. The lower the sound (pitch) the lower the frequency. Range that the human ear can hear is 20 to 20,000 hz.