The invention relates to sensor signal analysis. It relates particularly, but not exclusively, to methods, systems an devices for monitoring and processing the sensor signals to determine automatically characteristics of event represented by the sensor signals. It is particularly, related to methods, systems and devices for monitoring moisture in absorbent articles such as diapers, incontinence garments, dressings and pads resulting from wetness events caused by, for example, urinary and/or faecal incontinence. It includes a method for processing sensors signals representing an event in an absorbent article. The method comprises: receiving sensor signals from sensor representing one or more events in an absorbent article； and processing the sensor signals to determine characteristic of at least one event in the absorbent article. The method further includes the step of carrying out learning phase and identifying an optimal mathematical model.
