HRM305 Lecture Notes - Lecture 6: Stress (Mechanics), Inverse-Square Law, Horse Length
29 May 2017
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Document Summary
Physical agents are sources of energy that may cause injury or disease if they are not controlled or managed properly: matter, movement and so forth, noise. Complex; very detailed and specific people who deal with this and radiation: radiation. Ambient refers to an all-encompassing condition associated with an environment. It is a combination of sources all around us: all encompassing= ambient (within this environment) When we"re born range is: 20-20 000 hz. Dog whistles are greater then 20 000 hz- just because you cannot hear it doesn"t mean its not safe: same thing as smell of chemicals. Pressure: how closely together the wave lengths are: accumulated effect; ears are almost like grass walking on that path of grass over and over again, wearing out the grass. Ears are the exact same because you may not feel the effects right away but will feel it in the long run. The effects of noise on humans include the following: psychological effects.
