Significance of OM (ॐ) in Hinduism

OM (AUM) has a paramount importance in Hinduism. Most vedic prayers start with AUM. AUM has a connection with the universe. Science is showing what our ancient Rishis said was fact. Know the science behind chanting AUM.

We chant OM to connect with our true Self. Since our true Self is the same as the Supreme Self, when we connect with our true Self we connect with the Supreme Self.

In Sanskrit, the sound "O" is a diphthong spelled "AU". AUM is comprised of three sounds: "A", "U" and "M". There is also a fourth sound which is a universal vibration and is the essence of all other sounds.
AUM represents many trilogies of meanings:

Symbolically the three letters embody the divine energy (Shakti) and its 3 main characteristics:

(1) Beginning of the universe - Brahma
(2) The life period of universe - Vishnu
(3) Destruction of the Universe – Mahesh (Shiva)

AUM is the word which represents the three first forms of God:  

1) Brahmaa (Creator of universe)
2) Vishnu (Operator of universe)
3) Mahesh (Destructor of universe).  

As per Mandukya Upanishad:  

1) The "A" stands for the state of wakefulness, where we experience externally through our mind and sense organs.
2) The "u" stands for the dream state, in which inward experiences are available.
3) In the state of deep sleep, represented by the sound "m", there is no desire and consciousness is gathered in upon itself.

AUM is the one eternal syllable of which all that exists is but the development. The past, the present, and the future are all included in this one sound, and all that exists beyond the three forms of time is also implied in it.

Earth, Atmosphere, and Heaven.

Science behind chanting AUM

Vedic scholars understood the symbiotic relationship of wave energy. Everything in the universe is pulsating and vibrating - nothing is still!

Science is now proving that what our Ancient Rishis said was fact!! Chanting of AUM when recorded in a Tonoscope, it results in a 3 dimensional representation of the cosmic energy (Sri Chakra Meru). The origin of "Sri Chakra Meru" is dated back to 2500-3000 B.C.

When we chant AUM, it produces a vibration in us which resonates with the universal vibration of AUM, and we are elevated from our everyday minds to relationship with our true Self. We chant AUM to be in tune with the true Self. The sound AUM, when chanted, vibrates at the frequency of 432 Hz, which is the same vibrational frequency found throughout everything in nature.

In addition the vibrations and rhythmic pronunciation also have a physical affect on the body by slowing down the nervous system and calming the mind similar to meditation. When the mind is relaxed, your blood pressure decreases and ultimately the health of your heart improve.

See more at: http://experiencehinduism.com/scientific-facts/chant-om-aum-significance-science#sthash.cXwF1aOP.dpuf