Why do some Hindus say "ram ram" twice?, why not only once like "ram" or thrice like "ram ram ram"? What is the actual reason behind that?
Certain sounds are associated with some vibrations which enhance the functioning of Chakras of body.
The following text was taken from this link:
For example, Ram is the mantra for manipura chakra (navel centre) and if it is chanted in kirtan or repeated in japa, it will stimulate the abdominal area benefiting complaints such as peptic ulcer, constipation, diarrhoea and other digestive disorders.
Mantras Chakra Physical location
Lam Mooladhara Perineum
Vam Swadhisthana Base of the spine
Ram Manipura Navel centre
Yam Anahata Heart centre
Ham Vishudhi Throat
Om Ajna Eyebrow centre
The question is
Why do some Hindus say "ram ram" twice?
There is a reason for saying ram, some may say twice.
The ultimate aim of any scripture related to the God is to goad the people towards the God/Spirituality/SELF REALISATION.
Achieving spirituality is easier said than done. Even persons with track record of doing austerities with sincerity and commitment often slip back due to the power of senses.
Then what about ordinary people?
Sri Krishna says
Those who relinquish the body while remembering Me at the moment of death will come to Me. There is certainly no doubt about this. (Bhagavad Gita 8.5).
Here, we should not confuse ourselves with the notion that it is the form/name of Sri Krishna alone that gives liberation.
At the time of uttering those words, the mind of Sri Krishna had merged into the BRAHMAN/GOD, and thus those were the generalised utterances, ie., any form/name of the God.
However, human nature/prArabdha will not allow one to remember the name of the God at the deathbed unless practised for long.
The sages/ancient of the earlier era, found some subtle techniques in goading people towards spirituality. The following are some of such simple but subtle techniques, which will make them remember the name of the God, at least occasionally.
Doing bhajans on auspicious days like birth days of Krishna, Rama or Shiva Ratri or Dussehra, etc
Fasting on ekAdasi or in the month of kArtika, simultaneously remembering the name of the God or doing pArAyana of a text of his/her choice
Greeting other persons with the name of God. Easiest name of the God that can be used is Ram. Some may be saying Sri Rama.
Even in funeral procession, the name of the Sri Ram will be chanted in some areas, in a different way, to indicate that only the God is the Ultimate/TRUTH, but not the mortal body - rAm nAm satya hai.
In many of the families in our area, including myself, people say whenever start doing something anew, we will write or utter the name of Sri Rama and start the listing of issues.
It is not restricted to Hinduism alone. Even Muslims say Wa alaykumu s-salam, indicating May the peace and mercy of Allah be with you too.