In rice paddy filed sometimes the bird comes to eat the rice if we clap the hands, the birds fly away so when you clap your hands and chant Hare Krishna, our sins fly away like the birds. When we chant Hari, Krishna will take away the garbage.
"directly enacted from the spiritual platform, and thus this sound vibration surpasses all lower strata of consciousness - namely sensual, mental, and intellectual. As such anyone can take part in the chanting without any previous qualification." - A.C. Bhaktivedanta