The problem for me is that we haven't conceptualized what we mean by "reduced" consciousness. Reduced in what way?

If we create an analogy with audio - audio can have 2 properties: frequencies and volume. Frequencies are the content of the audio and volume is how "present" the sound is.

Well the same could be applied to consciousness. When we say reduced consciousness do we mean that the mind experiences less content (frequencies) or do we mean that all the frequencies are there but at a reduced volume?