Some Results Concerning the Perception of Musical Distortion in Mistuned Single Sideband Links
J. Hanson, E. Hall · IRE Transactions on Communications Systems · 1975
Tests were performed over a good communications grade single sideband (SSB) channel on the listenability of various types of music under frequency shift distortion up to ± 30 Hz. Sensitivity to this type of distortion depends upon the type of music, and frequency shift should be less than ± 5 Hz to avoid noticeable degradation.