Dear friends,
There is a wonderful book about so - ham sound that happens during breathing. It explains its meaning and importance for health as well as spirituality very well.
The hamsa yoga or so-ham sadhana is crowned in the Indian scriptures
as the paramount spiritual endeavor that enables natural conjunction
of the individual consciousness and the Brahm. Despite being superior in terms of its culminated effects, this sadhana is easiest
and free from the ascetic disciplines and difficult practices of yoga
that are associated with other higher level spiritual
sadhanas. The treatise of “Sabda Brahm - Naad Brahm” (volume 19 of ?Pt. Shriram Sharma Acharya Vangmaya? Series) devotes one full chapter to this important topic. The present book is compiled from the English translation of this invaluable text.
Meditation on the sounds of ?soa ? and ?ham? ? produced continuously
by the harmonized inhalation and exhalation in each breathing
cycle during a Pranayama ? is practised in the initial phase of the
Hamsa yoga.
You can find out more about this at;
http://www.awgp.org/english/books/hansyog.pdf
I hope you also enjoy it.
Datta