S. P. BRACHMAŃSKI and W. MAJEWSKI, “Probability density distribution of instantaneous values of a speech signal in Polish”, Arch. Acoust., vol. 4, no. 3, pp. 193–203, Mar. 2016, Accessed: Jan. 18, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/3377