FMX is the name of a commercially unsuccessful noise reduction system developed in the 1980s for FM broadcasting in the United States. FM stereo broadcasting is known to incur up to a 23 dB noise penalty over that of monophonic FM broadcasting; this is due to the combination of the triangular FM noise spectrum and the wider baseband bandwidth occupied by the stereo multiplex signal.
FMX is the name of a commercially unsuccessful noise reduction system developed in the 1980s for FM broadcasting in the United States. FM stereo broadcasting is known to incur up to a 23 dB noise penalty over that of monophonic FM broadcasting; this is due to the combination of the triangular FM noise spectrum and the wider baseband bandwidth occupied by the stereo multiplex signal.
Source: Wikipedia "FMX (broadcasting)" · CC BY-SA 4.0
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