A RIDDLE FOR THE SOUL

This is a riddle:
At first I scream.
Then I am reduced to a whisper.
Soon I bear but the faint echo of that whisper.
Furthermore, as you do not heed my call, I am reduced to the faintest echo of the faintest echo of a whisper, wrapping you in a warm, luxurious, satin sanguinity.

What am I in my three phases?
1.The conscience amour-propre.
2.The concscience vagabond.
3.The conscience lost...