अकस्मादागतोत्पांत नाशयाशु नमोस्तुते। What ever mantra you chant Hanuman Ji, keeping in your mind its that means, chant it gradually or mentally with complete devotion. Never chant the mantra aloud. As astrologers claim, Lord Hanuman would be the supply of electricity and bravery, for this reason chanting the Hanuman mantra https://theidirectory.com/listings13213998/the-basic-principles-of-hanuman-chalisa