Acoustic black hole: the Sagnac effect, the geodesics and the bounding values of the parameters Soumya Kanti Roy, Tanmoy Ghosh, B. Raychaudhuri and Aditya S. Mondal Eur. Phys. J. C, 84 6 (2024) 565 Published online: 04 June 2024 DOI: 10.1140/epjc/s10052-024-12931-2