Causal Listening: Listening for the purpose of gaining information about the sound’s source.
Semantic Listening: Listening for the purpose of gaining information about what is communicated in the sound.
Reduced Listening: Listening to the sound for its own sake, as a sound object, by removing its real or supposed source and the meaning it may convey.
Deep Listening: Listening to everything all the time, and reminding yourself when you’re not. Actively listening, both in the moment, and outside.