PSYB51H3 Lecture Notes - Lecture 1: Hair Cell, Mecha, Wind Wave
Document Summary
Objects move twrds and away f/ objects causing diff"s in density between of molecules there are areas where air pressure is increased/decreased - these areas travel away f/ the object w/o the molecules moving away/twrd object. When looking at one point in space, the air pressure will inc/decrease at a cert. freq. doesn"t matter high/low freq. the speed of the waves proprogating away f/ the obj. stays the same; freq. is diff. f/ speed. *waves make the moles move; these waves move away f/ object in some sort of radial fashion. In water waves = move up and down, but in acoustics it is 1d, up and down move. of wave = pressure. Db = 20*log(p/p0) p=sound that you act. trying to quantify/intensity of sound you want to quanitify; p0=standard/minimum you are perceiving. Perceive increm"s in loudness in irreg. fashion b/ in terms of energy you have exponential relat. (ev.
