These're Skywalker Sound sound effects, created by David Farmer, Ethan Van der Ryn and/or Michael Semanick for the Eye of Sauron in The Lord of the Rings: The Return of the King (2003). They include SKYWALKER, ELECTRICITY - THE FORCE WHINE and SKYWALKER, ELECTRICITY - PULSE SHRIEK 02.
Links:
https://soundeffects.fandom.com/wiki/SKYWALKER,_HORROR_-_SAURON%27S_EYE,_FIRE,_CHOIR-LIKE#Audio_Samples
