I discovered the use of Gayatri Mantra as a door bell on a visit to one of my friend’s house. I was surprised about it then. Later, I found that it is being sold online.
The online traders says
It is an alternative doorbell that does not blast into your ear; on pressing the bell a sacred chant – ‘The Gayatri Mantra’ - is played once instead. Each time you have a visitor, you get the benefit of improved psychic vibrations which occur whenever a sacred chant is activated.
So is it wise to use Gayatri Mantra as Doorbell?