First step

You have to go to \Documents\My Games\Fallout4 open Fallout4.ini

Find "sResourceDataDirsFinal=STRINGS\" and replace it with "sResourceDataDirsFinal=STRINGS\, sound\" without the quotation marks.

Second step

Drop the folder containing the sounds in \Steam\steamapps\common\Fallout 4\Data


Start the game up and enjoy your new sounds!