The sound came from a car passing by the recorder. There'll be clear sound of a car passing through with normal speed. Located in Tampere, Finland. This was recorded with Iphone X (2017), Apple, MEMS microphones. Recording App: Audio Recorder (Jakub Bartus) This sound serves as training data for our Audio & Speech Processing Project. Also, it helps recognize the sound of cars passing by in daily occasions of Tampere, Finland for people in need.