Sonification: tweak section header comments
Use private rather than protected fields & methods

See:
http://developer.imagej.net/coding-style#Private_over_protected_fields_and_methods
Sonification: fix style of Java constants
Sonification: remove superfluous constant
Sonification: fix ordering of code blocks

See:
http://developer.imagej.net/coding-style#Ordering_of_code_blocks
Sonification: clean up def creation a little

This eliminates an unnecessary inner class.
Sonification: only log in debug mode