there is provided an earpiece or a headset comprising an audio input for receiving an audio signal to be reproduced , at least one electroacoustic reproduction transducer , an audio unit for effecting audio processing of the received audio signal , at least one converter unit for extracting power from the audio signal received at the audio input , a power storage means for at least partial intermediate storage of the power extracted from the audio signal , and a power control unit for controlling the extraction of the power from the audio signal and for controlling a power supply of the audio unit , in particular by way of the power stored in the power storage means and extracted from the audio signal .