Interpretation of the fundamental frequency of the discrete spectra as a possible quantifier of the inclination in comparison with the frequency spectra in ultrasound distance measurement / Vladimir Madola ... [et al.]. -- ilustr. -- Bibliografické odkazy. In: ICYS 2022. -- 1st ed.. -- 140 s.. -- 978-80-552-2591-3 ICYS 2023. -- Nitra : Slovak University of Agriculture, 2023. -- S. 105-108. frekvencia * frekvenčné charakteristiky * ultrazvuk * meranie dĺžky * meranie drsnosti povrchu