The invention relates to a method and a communication
system for improving the playback quality of audio signals which have been transmitted by radio, in particular by an aircraft (10), as a radiotelephony message (11), wherein k) at least one unchanged
audio signal (1) is received by a communication
system (12), the unchanged
audio signal comprising a useful
signal and an interfering
signal, and the interfering
signal being composed of a plurality of interfering signal components, l) the interfering signal components are removed from the
audio signal, and an
air traffic controller workstation (13) connected to the communication
system plays said audio signal back to an
air traffic controller (14) in real time as an audio signal which has been filtered by a filter, m) a differential signal between the unchanged audio signal and the filtered audio signal is formed in parallel with the playback at the
air traffic controller workstation, n) a device for quality inspection checks the differential signal for any voice components of the radiotelephony message which may be present, and o) if a predetermined quality threshold value is not reached, an action at the air traffic controller
workstation is triggered.