Two helicopters landing and taking off one after the other. Sound recording during the open day of the UIISCI in Nogent-le-Rotrou in France. UCS Category: AEROHeli. Duration: 02:50.
I sing in overtone. Overtone singing is a vocal technique for producing a vocal timbre characterized by two notes of different frequencies. My first voice is a root C, my second is a whistle. more information on this song: en.wikipedia.org/wiki/Overtone_singing. UCS Category: VOXSing. Duration: 00:17.
Sound recording in the passenger compartment of a car during a short journey on a road limited to 90 km/h. It is a Citroën C3 petrol. UCS Category: VEHInt. Duration: 03:13.