HRM 3400 Lecture Notes - Lecture 3: Noise-Induced Hearing Loss, Hearing Conservation Program, Sound Pressure

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

Document Summary

Physical agents- all types of energy (distance/mass/time) that body cannot resist. Health effects chronic take years to show signs; can be acute. Types of physical agents: noise ambient (all around us) Sound type of energy made up of vibration (causes movement in air particles) Can"t go through something where there is no give to it; need change in pressure. Wsib on hearing loss 1 million in comp $ b/w 1995-2004. Sound travels through air in wave pattern called sine wave. Sound waves per second tell you the frequency on sine wave. More you get per second call it # of hertz. How loud noise is (depth of sound wave-variation in air pressure) Looks at intensity of sound & measures in decibels. Frequency- wavelength (distance one complete sine wave will travel); identify what pitch is. Expressed in hertz (hz) or life cycles = of time/second complete sine wave repeated. Range human can hear is 20 to 20,000 hertz.