Transactions of the American Society of Heating, Refrigerating and Air-Conditioning Engineers 1968 [1] Quote: 'A "purple noise," accordingly, is a noise the spectrum level of which rises with frequency.'
Mitchell, Don P. (1987). "Generating antialiased images at low sampling densities". Proceedings of the 14th annual conference on Computer graphics and interactive techniques. Vol. 21. pp. 65–72. doi:10.1145/37401.37410. ISBN0897912276. S2CID207582968.
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Välimäki, Vesa; Lehtonen, Heidi-Maria; Takanen, Marko (2013). "A Perceptual Study on Velvet Noise and Its Variants at Different Pulse Densities". IEEE Transactions on Audio, Speech, and Language Processing. 21 (7): 1481–1488. doi:10.1109/TASL.2013.2255281. S2CID17173495.
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Mellen, R. H. (1952). "The Thermal-Noise Limit in the Detection of Underwater Acoustic Signals". The Journal of the Acoustical Society of America. 24 (5): 478–80. Bibcode:1952ASAJ...24..478M. doi:10.1121/1.1906924.
"Federal Standard 1037C". Institute for Telecommunication Sciences. Institute for Telecommunication Sciences, National Telecommunications and Information Administration (ITS-NTIA). Retrieved 30 November 2022.
Mitchell, Don P. (1987). "Generating antialiased images at low sampling densities". Proceedings of the 14th annual conference on Computer graphics and interactive techniques. Vol. 21. pp. 65–72. doi:10.1145/37401.37410. ISBN0897912276. S2CID207582968.
Välimäki, Vesa; Lehtonen, Heidi-Maria; Takanen, Marko (2013). "A Perceptual Study on Velvet Noise and Its Variants at Different Pulse Densities". IEEE Transactions on Audio, Speech, and Language Processing. 21 (7): 1481–1488. doi:10.1109/TASL.2013.2255281. S2CID17173495.