The standard gong is the announcement chime used by BVG, Berlin's public transport operator, on its buses, trams and U-Bahn trains. Rather than a song or spoken phrase, it functions as a simple audio cue that tells passengers an announcement is about to follow, which is why it is instantly recognisable to regular riders in the German capital. Online, the short chime has been shared as a soundboard clip by creators who want an authentic Berlin transit atmosphere for travel videos, parodies and city-themed edits, keeping it in use well beyond the vehicle itself.