Comment Re:Uh oh...Batman becomes real? (Score 1) 40
How can it tell the difference between a response...a change in the state of something in the room...and a change in the object composition of the room itself? Without directionality, I don't see how it's possible.
You create a baseline for the null or empty room, either by capturing the room empty or by creating an average of a few nights' observations.
Transfer functions don't relate to spatial localization, they're different ways of figuring out directionality and both are independently reliable. Our heads use spatial localization (two ears) to detect the azimuth of a sound source, from both relative level and wavefront arrival time, but we determine the altitude of a sound source with transfer functions related to the shape of our heads and our outer ear structures.