Very good topic Dr. Let us take it to Umapathi Stapathi for expert views. Most times we see the base material being same. The gap between the pillar, the dimensions of the pillar, the latitude given to each pillar to vibrate (oscilate) should determine the note it produces.
Dear vijay It is wonderful information. I hope these pillars are available in India only. Not even ceylon, burama, pakistan, malysia etc. You may please confirm whether such muusical pillars exists only in India or in other western countries too? Can you further tell what is the relevence to these pillars in Easwaran temple alone? Any such pillars exists other than easwar temples? Is there any religious faith of easwar attached to musical these pillars? I shall be thankful to you if you kindly discuss the above issues