The invention comprises an apparatus for determining the contextual or physiological status of the individual wearing the apparatus. The system determines and stores one or more values into a memory. The paper product can be, for instance, a facial tissue, a bath tissue, a paper towel or the like. The control signals may be input into the interface device over a digital connection and output over an analog channel. A speaker is characterized by a slow varying or invariant channel that is learned and is tracked from single channel data by GMIA methods.