“…The recent technology advancement allows experimentally measuring the time-resolved data using a high-speed camera, and the data-driven analysis such as the proper orthogonal decomposition (POD) (Berkooz et al, 1993) or dynamic mode decomposition (Schmid, 2010) is often employed. There are many attempts to identify the screech tone from the time-resolved schlieren images (Li et al, 2021;Lim et al, 2020;Rao et al, 2020;Ozawa et al, 2018;Mercier et al, 2017;Ohmizu et al, 2022). However, a conventional high-speed camera still does not have a sufficient sampling rate for the visualization of the entire flow field with high spatial resolution.…”