The sound one hears when trying to unblock the ears by closing the nose with fingers and blowing hard.
0:15
Calmer, more relaxed hominid vocalizations—soft coos and grunts. The gentle, rhythmic scraping of a stone flake on wood. Playful, higher-pitched calls from the young, echoing lightly against the surrounding rocks and a soft wind
0:47
human hooting and whistling in background (both male and female voice). voice coming from a little bit distance