▁out ward ▁to ▁the ▁ends ▁of ▁the ▁string . ▁As ▁it ▁travel s ▁out ward , ▁this ▁initial ▁imp ulse ▁forces ▁the ▁wire ▁out ▁of ▁its ▁rest ing ▁position ▁all ▁along ▁its ▁length . ▁After ▁the ▁imp ulse ▁has ▁passed , ▁each ▁part ▁of ▁the ▁wire ▁immediately ▁begins ▁to ▁return ▁toward ▁( and ▁over sh oot ) ▁its ▁rest ing ▁position , ▁which ▁means ▁v ibration ▁has ▁been ▁induced . ▁Meanwhile , ▁the ▁initial ▁imp ulse ▁is ▁reflected ▁at ▁both ▁ends ▁of ▁the ▁string ▁and ▁travel s ▁back ▁toward ▁the ▁center . ▁On ▁the ▁way , ▁it ▁interact s ▁with ▁the ▁various ▁v ibr ations ▁it ▁induced ▁on ▁the ▁initial ▁pass , ▁and ▁these ▁interactions ▁reduce ▁or ▁cancel ▁some ▁components ▁of ▁the ▁imp ulse ▁wave ▁and ▁rein force ▁others . ▁When ▁the ▁reflected ▁imp uls es ▁encounter ▁each ▁other , ▁their ▁interaction ▁again ▁can c els ▁some ▁components ▁and ▁rein for ces ▁others . ▁ ▁Within ▁a ▁few ▁trans its ▁of ▁the ▁string , ▁all ▁these ▁can cell ations ▁and ▁rein for c ements ▁sort ▁the ▁v ibration ▁into ▁an ▁order ly ▁set ▁of ▁waves ▁that ▁v ibr ate ▁over ▁ 1 / 1 , ▁ 1 / 2 , ▁ 1 / 3 , ▁ 1 / 4 , ▁ 1 / 5 , ▁ 1 / 6 , ▁etc . ▁of ▁the ▁length ▁of ▁the ▁string . ▁These ▁are ▁the ▁harm on ics . ▁ ▁As ▁a ▁rule , ▁the ▁amplitude ▁of ▁its ▁v ibration ▁is ▁less ▁for ▁higher ▁harm on