An apparatus according to the invention for the classification of physiological events has a signal input for the input of a physiological signal representing or constituting a physiological event and a classification unit 1 for classifying the physiological signal on the basis of its signal shape. The cleaner, such as a handheld cleaner like a brush or lint roller, cleans the item or area to be cleaned. Optionally, methods include using the measure electrodes, in another mode of measurement, to make further resistivity measurements by applying a voltage to each measure electrode in both sets of sensor arrays while making third current measurements. A decision section selects a ringing tone generating section, a vibrator or a light emitting section based on which one of the speech component and the non-speech component is the dominant component and the volume of that dominant one. A cable coupling is interposed between the pneumatic hammer and the articulated hammer nose assembly. For each candidate group, an integrated indicator value reflecting the indicator values calculated for the candidates forming the candidate group is calculated.