Eski anons means old announcement in Turkish, a label Istanbul riders use for earlier generation metro and public transport voice messages associated with IETT, the city's historic transport authority. As newer automated announcements replaced older recordings across the network, short clips of the previous style began circulating online on soundboards and in nostalgia edits. The sound survives because it is so specific to Istanbul commuting, and creators reuse it to signal a metro setting, mark a throwback moment, or add local authenticity to travel and meme videos.