These are Star Wars sound effects used in many Star Wars movies, and it is also used in other media besides the Star Wars franchise. The sounds are designed and created by Ben Burtt.
The most common start-up lightsaber sound is a +12 pitch version of SCI FI - ROCKET BY from the Hanna-Barbera Sound Effects Library made by Sound Ideas Canada Ltd..
The lightsaber hums are NOT to be confused with Hollywoodedge, Quick Laser Zap Shor CRT051001, Hollywoodedge, Explo Laser Low CRT051002, or Hollywoodedge, Synthy Hums CRT051303.
Links:
https://soundeffects.fandom.com/wiki/SKYWALKER_LIGHTSABER_SOUND#Audio_Samples
SKYWALKER LIGHTSABER SOUND has been suggested to play 3 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.