R. SALAMON, R. KOWALIK, and I. POSTAWKA, “Detection and signal processing in the acoustic echolocation system for the blind”, Arch. Acoust., vol. 22, no. 3, pp. 277–296, Jan. 2014, Accessed: Jan. 18, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/955