Ben Burtt, as sound designer People & Technology

Ben Burtt (born July 12, 1948) is an American sound designer who created the sound effects for Star Wars (1977), including the lightsaber hum, Darth Vader's breathing, and R2-D2's voice. Before his work on Star Wars, science-fiction films tended to use electronic-sounding effects for futuristic devices; Burtt pioneered a more natural approach, blending "found sounds" — the lightsaber hum came from a film projector idling combined with feedback from a broken television set, and the blaster effect started with hitting a guy-wire on a radio tower with a hammer. (wikipedia)

He designed the pod scream and other sound effects for Invasion of the Body Snatchers (1978), coming to the production fresh off Star Wars. His son Benny Burtt followed him into the field and works as an assistant sound FX editor at Skywalker Sound. (ask.video)

In the wiki

• The Pod Scream is the primary page covering Burtt's work, including the pig-squeal construction of the scream, the ultrasound recordings from his wife's pregnancy used in the pod-birthing scenes, and Kaufman's anecdote about Burtt identifying door slams by studio and year.
• The Ending (Invasion of the Body Snatchers) notes that Burtt built the scream from layered animal recordings and describes the effect of it emerging from Sutherland's mouth.
• Donald Sutherland discusses Burtt playing the scream live on set while Sutherland performed the final shot.
• Veronica Cartwright confirms Burtt's scream rig was active during the ambush ending, producing Cartwright's genuine reaction.
• Production History (Invasion of the Body Snatchers) covers Burtt's involvement in the production, noting his arrival from Star Wars.
• Invasion of the Body Snatchers (1978) credits Burtt as sound designer.
• Physical Media Releases (Invasion of the Body Snatchers) and related pages discuss the sound design's presentation on home video.