What is Sound?(Sound Explained) - Sound Speed & Pressure Waves & Frequency

(This video has Subtitles) In this video i try to make an approachable explanation of what is sound. Because is something so fundamental in our lifes, deserves to be understanded in physical terms but don't worry, this is a simplified version. First is explained how sound is a vibration and a wave, then is approached a very important property of sound, Frequency.I also talk about the speed of sound and how it changes with the medium in wich it propagates.