SMAGOWSKA, Bożena. “An Objective and Subjective Study of Noise Exposure Within the Frequency Range from 10 KHz to 40 KHz”. Archives of Acoustics 38, no. 4 (January 21, 2014): 559–563. Accessed January 17, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/320.