A plurality of \u201clocal\u201d interleavers replaces a single global interleaver for processing encoded data. The invention presents a method and device wherein the beam pattern of an antenna, comprising two or more sectorised antenna elements with overlapping beam patterns, is adapted such that the position of the source of interfering signal is preferably substantially located within the overlap of said beam patterns. A storage device is provided for storing at least one calibration factor for compensating for errors associated with at least one of at least one external current transformer and at least one external potential transformer that operates on the electrical energy provided to the meter device. Operation of the headset is modified based on the donned or doffed status of the earbuds.