J. D. Johnston (1988). "Transform coding of audio signals using perceptual noise criteria". IEEE Journal on Selected Areas in Communications. 6 (2): 314–332. doi:10.1109/49.608. S2CID5999699.
Tchernichovski, O., Nottebohm, F., Ho, C. E., Pesaran, B., Mitra, P. P., 2000. A procedure for an automated measurement of song similarity. Animal Behaviour 59 (6), 1167–1176, doi:10.1006/anbe.1999.1416.
J. D. Johnston (1988). "Transform coding of audio signals using perceptual noise criteria". IEEE Journal on Selected Areas in Communications. 6 (2): 314–332. doi:10.1109/49.608. S2CID5999699.
Luscinia parameters "Wiener entropy is an alternative measure of the noisiness of a signal. It is defined as the ratio of the geometric mean to the arithmetic mean of the power spectrum."