This is a sound file to calculate the speed of sound propagation in air. Two microphones 50 centimeters apart and a movie clapperboard to generate a sharp sound. Follow this tutorial to perform the experiment: lasonotheque.org/education-sonore-f4.html#propagation. UCS Category: TEST. Duration: 00:01.
Cinema projector (35mm Kinoton, FP30) vacuum. Ventilation and lamp off: Getting Started, roullage and extinction (Sound: Behind projector). Can be synchronized with the sound n ° 0069. UCS Category: COMAv. Duration: 00:40.
Crackers, snappers, whippersnappers, pop-its, bang-snaps: Throwing firecrackers on the ground. They contain small amounts of silver fulminate and gravel. 4 clicks. UCS Category: FRWKRec. Duration: 00:03.