Abstract: The invention relates to a method of operating an electronic device (6), the device (6) comprising a receiver (8) for receiving a wireless analogue signal (10), a converter (12) for converting the received analogue signal (14) to a digital input signal (16, 16?), a signal processor (18) for generating a digital output signal (20) from the input signal (16, 16?), and a transmitter (22) for transmitting the output signal (20) as a wireless digital signal (24), wherein the input signal (16?) is filtered to generate the output signal (20) such that a noise signal (30) in the input signal (16?) generated by the signal processor (18) and/or the transmitter (22) is reduced.