The scientifc reason or the significance feature behind bells in temple.
All the Hindu temples have bell at the entrance of the temple or inside the temple and usually you need to ring it before you enter temple and while doing pooja to God.
Is it to wake up the Lord? But the Lord never sleeps. Is it to let the Lord know we have come? He does not need to be told, as He is all knowing. Is it a form of seeking permission to enter His precinct? It is a homecoming and therefore entry needs no permission. The Lord welcomes us at all times. Then why do we ring the bell?
Most of us would have thought why do we see bells in all the Hindu temples and what will be the significance nature of bell to keep in all the temples and ringing while doing Pooja also and here is a scientific reason behind Temple bell presence; Bell is not made up of just your ordinary metal. It is made of various metals including cadmium, lead, copper, zinc, nickel, chromium and manganese.
The proportion at which each one of them mixed is real science behind a bell. Each of these bells is made to produce such a distinct sound that it can create unity of your left and right brain. The moment you ring that bell, bell produces sharp but lasting sound which lasts for minimum of seven seconds in echo mode (if you found a bell whose sound doesn’t last for 7 seconds.. then it’s not made in perfect way)
The duration of echo is good enough to touch your seven healing centres or chakras in your body. The moment bell sound happens your brain is emptied of all thoughts.
Invariably you will enter state of Tran’s state where you are very receptive. This Trans state is the one with awareness. You are so occupied in mind that only way to awaken you is with a Shock! Bell works as Anti-dote to your mind. Before you enter temple – In other words “it helps to ring to wake yourself temple.