[bitfhacker]

In the past weekend I saw the movie "Lisbon Story". The main character was a "sound maker" for movies that were filmed with no sound (I don't know the right term). His job consisted in reproduce the sounds of, for example, a water splashing sound, a horse running, an egg frying, a pigeon flapping his wings trying to eat...

[Xophmeister]

https://en.m.wikipedia.org/wiki/Foley_(filmmaking)

[calt]

This is still done. The incidental sounds you hear in movies are often (or almost entirely?) dubbed after the fact, and are not from the microphones on the filming set.

[Stratoscope]

Foley Artist

https://en.wikipedia.org/wiki/Foley_(filmmaking)