Acoustics
An inner condition allowing you to either be clearly aware of delicate inner feelings, or disrupting your awareness, depending on dream circumstances.
Because sound is a factor, see sound.
Useful Questions and Hints:
Can I define what it is I am aware of and what that suggests about me?
Is there an element of great awareness here? If so what am I sensing?
How am I responding in the situation and can I connect that with waking life?
You can define more of the dream by using Dream Processing.