Jai Sri Ganesha,
There are five kind of sounds which could be heard from the outer world,
But there is sound which pitched at the eternity of self manifest from the divine source could be heard in serene truth of self,
May be the voice of God, May be that Shabd Brahma which relates to God,
Ancient mystics have made fair approach unto it and sail safe with a message on the sphere of time for fellow beings in line with,
May Lord bless all,
thanks please