Dear Sushil,
I have read somewhere on the internet tthe following things.
"To purify a place the loud congregational chanting accompanied with mridanga drums and kartal hand cymbles is very potent when done with great attention. On a personal basis too, the concentrated chanting of Japa on beads is also very effective, the mantra being non-different from the Lord. However, and this is no defect on the part of the mantra, depending on the attentiveness of the sadhaka (chanter) the effect can be greater or lesser, just as proprtionately one takes shelter of the suddha naam (pure Holy Name)."
So a good sankirtan will surely help you as where the devotees sing the lord's glory there is Krishna, and where Krishna comes nothing else dare to be.
Hare Krishna.
