Propagation of ultrasound near phase transitions in the liquid crystal working environment of technical devicesAlexey Larionov, Sergey Dedov, Valentin Mashin, Ljubov Gorban, Vladimir Chongin and Angelika MachinaE3S Web Conf., 371 (2023) 03002DOI: https://doi.org/10.1051/e3sconf/202337103002