Fascinating reading on sound

Singing bowls standing on stones with waterdrops and water flowing around them

Berendt, Joachim Ernst (1985):
 Nada Brahma. The World is Sound. 
Insel Verlag

Berendt, Joachim-Ernst (1993): 
I hear – therefore I am. Listening exercises, thoughts on listening.
 Goldmann Verlag

Berendt, Joachim-Ernst (1998b):
 I hear, therefore I am. 
In Vogel, Thomas (ed.) (1998). pp. 69–90.

Berendt, Joachim-Ernst (2000a): The Third Ear. On Hearing the World. Rowohlt Verlag

Hess, Peter (1999): Singing Bowls for Health and Inner Harmony. Ludwig Verlag – Südwest Verlag