Universe is all about vibration...
life is also vibrate..
in temple , our ancestors put small and big bell , which is differ from temple size and deity.
each and every bell release vibration after ringing it , which arise notable amount of hormones in our body , which help us to relaxing and feel happy.
One of the great mind of scientist named Nikola Tesla once said that i just 'line up' my mind to adjust the released vibration of universe and invent my theory.