I, an American, became conscious of a sound in my head around the age of 2 1/2 or 3.  My mom was still putting me down for naps and being the clever woman that she was, she would also put me in her room where there were no toys to play with.  I almost never went to sleep, so I would lay there, listening to the sound.  I thought the sound was a bit annoying at the time and tried to ignore it, which was impossible.  
Around the age of 12, I started questioning our church leaders and I concluded they did not know what they were talking about.  My parents allowed me to go church with friends and their churches.  I discovered that most people did not understand the words they shared.  
At the age of 18, I read all spiritual texts I could find.  At 20 I found a western ‘conscious, spiritual’ school and studied, learning much for 18 years.  After leaving this school I studied with various teachers until coming across Nisargadatta Maharaj and Ramana.  This seemed the end of my (there is no me and mine) search.  Inward changes occurred and the inner sound became suddenly very loud ever since.  There was laughter for almost a year, because of such inner joy and the feeling of inner freedom.  However, still there was no explanation of what caused the sound.
Fast forward 10 years, I have had throughout my life, 3 near-death experiences and was attending a city meeting for those who have experienced such happenings.  There was a new fellow attending that I did not recognize so we ended up talking and decided to go to a Starbucks to discuss the topics further.  During our conversation he mentioned that he had a spiritual teacher who talked about the ‘sound’.  I told him that I had been listening to an inner sounds for years and could he tell me about it.  He said that the sound I heard could not be what Ishwar talked about.  Of course I was very interested and had to check it out for myself.  He wrote out Ishwar’s name on a napkin and we parted ways.  I have never seen him since that day, either in this city or at any ISHA event.  Curious.
I went home, looked up ISHA and found out there was an event in a city a couple of states away from my home and I just happened to have a ticket to a close by city to see my mom, for the dates listed, which was a few months away!
I attended the 3-day event, ask Ishwar if I could be initiated and he said yes, in Rice Lake, so there I was, a couple of months later, initiated.  I wanted to understand the ‘sound’.  And now understanding is.  Of course there is so much more . . . however, it was the inner sound that lead me to this great group of individuals and Higher ( there is no hierarchy of higher-lower) beings.