Similarly, some other effects relate exactly to the story in a way that makes them redundant to our own imagination and prevent us from relaxing into the ambience. For example, some door knocking sounds : we imagine these because they are announced by the narrator so we don’t need to hear them too as a sound effect, contrary to the continuous background ambiance that you give depth to. You prevent us from forgetting the description of the scene when you take care of the general ambience and you provide more immersion with some special effects for the most unusual sounds, there is simply this slight redundance sometimes a bit.

I respectfully disagree here. I really like the addition of sound effects.