This, it is believed, he carries at all times in one of His four hands. Another well-known purpose of blowing the conch and the instruments, known traditionally to produce auspicious sounds is to drown or mask negative comments or noises that may disturb or upset the atmosphere or the minds of worshippers. Aum Aum is one of the most frequently chanted sounds in India. It has a profound effect on the body and mind of the one who chants and also on the surroundings. Most mantras and vedic prayers start with Aum .
All auspicious actions begin with Aum .
It is even used as a greeting - Aum , Hari Aum etc. It is repeated as a mantra or meditated upon. Its form is worshipped, contemplated upon or used as an auspicious sign. Aum is the universal name of the Lord. The Lord is all these and beyond.