Listen to the real Sierra Sounds recordings: These sound clips have been verified by experts as authentic. The tape reels were not manipulated and other studies have concluded they are almost certainly not human.
Warren and Louis Johnson, inside the Sierra Camp Shelter. First-ever documented recordings in 1971.
Aggressive sounds later titled or known as the “Disagreement” recording with Al Berry in 1972.
Biggie is in the camp banging the toilet seat lid. 1974, Ron Morehead & Bill McDowell
Loud whooping calls. Ron Morehead & Bill McDowell interacting with Biggie 1974 *(same night as toilet seat interaction)
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