Sound artists

Sound engineer:

What does a sound engineer do?
A sound engineer  regulates and controls the volume level and sound quality during recording sessions by the use of control devices. They also copy some soundtracks from the main recording media, using sound duplication and editing equipment like "garageband" and "premier pro" both of these applications can be used to modify and tweek things like pitch, bass, depth, volume, background noise and layers of different sounds can be layered on top of one another to create a "montage" of sound.

Foley sound artists:

A foley sound artist is a person who recreates sounds for a scene in a film off set and usually in a studio. For example if a galloping horse featured in a film the sound probably would of been from a person holding some horse shoes and hitting them on the floor in time with the film.
Foley sound is used to eliminate any background  noise which may have been picked up by the microphone during filming. For example wind noise may be picked up by the microphone this commonly happens in films where someone may be following a car in a car chase.