PHY 205 Study Guide - Final Guide: Particle Displacement, Longitudinal Wave, String Vibration
Document Summary
Vibratory patterns that are random and have no pattern (these sounds contain a broad range of frequencies) 2 or more frequencies ex: hairspray can spraying, drums. Vibration of medium is 90degrees re:direction of wave propaganda. Note peaks and valleys sound wave propaganda air particles move over a very small distance. Wave is propagated in same plane as particle displacement. Sound is characterized as propaganda of density changes through an elastic medium. Sound is defined as transfer of engird through and elastic medium. Energy is transferred in direction wave is propagated (a transfer of energy through an elastic medium) Occurs when restoring force acting on an object (elasticity) is directly proportional to displacement of object from its equilibrium point but in opposite direction. Air is made up of many molecule that move about randomly. Postive pressure is greater than patmos (atmospheric pressure) what we hear as sound. Compression area of positive pressure pushes air molecules closer together.
