Passage of a boomerang or a stick that flies while turning. Doppler-Fizeau effect of a passage from left to right, made by computer. UCS Category: SWSH. Duration: 00:04.
Sound of the crowd in a pedestrian street in Lourdes (in France); quite dense and noisy. Recorded in August 2018. UCS Category: AMBUrbn. Duration: 01:44.
Song of robin, a garden bird. He cries from a tree, spacing his songs for 2 to 3 seconds, then stops, changes his tree and starts again a few dozen times and so on around his territory. UCS Category: BIRDSong. Duration: 00:03.