Metro lines 2,4 and 5 have skip-stop services during peak hours. They are called either Ruta Roja (Red route) or Ruta Verde (Green route), and the trains stop only in the estaciones comunes (common stations) and the stations marked in either red or green.
There's a doors-closing beep like in Paris, sometimes accompanied by a message in Spanish "Cuidado con el cierre de puertas" ("Caution with the closing doors") (amr). Most stations are not announced, except interchanges, where the driver says in Spanish: "Proxima estación [station name], lugar de combinacion a linea [line number]" ("Next station [name], transfer to line [number]"). At termini, something like "Señores pasajeros! Estacion terminal [station name], se les recuerda a los pasajeros que todos deben bajar del tren, Metro de Santiago agradece su preferencia" is announced ("Dear passengers! Terminal station [name]. Take note everyone should get off the train, Metro de Santiago appreciates your choice"). Some trains have automated voices. Opening doors are announced "Permita bajar antes se subir" ("Let alight before boarding"), closing doors, "[beep] Se inicia el cierre de puertas" ("[beep] Closing of doors begins") (Youtube).