As per Agama, Pooja bell is rung
- To invite god.
- To chase away evil spirits.
- To control wandering mind
- Sound is used by all living being either to invite or to warn.
- Now human started using Electrical, Electronic devices, but others continue using their voice.
- Example of invitation: if the person rings the bell from cabin, the person outside is invited.
- Example of warning: The siren sound of fire extinguisher vehicle, ambulance etc.
- The evolution of sound had been,
- Voice
- Hitting and blowing.
- Electrical and electronics.
The Automatic pooja bell is getting the pooja bells to the present stage. Evolution is important to sustain a requirement.