Is there any way to stop neighbors from singing loudly?

Posting instructions, euphemistically speaking, working for a week, knocking on the door twice, looking for a property for a week or ten days, and calling the police for a week cured the trouble of singing in the middle of the night downstairs. At present, the effect is quite fast, one month. As for the daytime, besides my aunt's folk songs, there are guitarists, pianists and pop singers around. By the way, a violinist came recently in the morning and heard a female voice singing bel canto. Being in a place where elites gather, I can only prepare to play red songs such as Jiangnan Leather Factory or Unity is Power on the stereo when my aunt opens the window to sing again, so that I can feel the influence of the revolutionary spirit.