Hi! My name is Sound. If you think of it I am mechanical wave. I am also a longitudinal wave. As you know i can be very noisy like the sound of busy streets in a city.
I am "created" when particles like air is moved and forced out of a state of rest. For example with we talk our vocal chords vibrate producing sound
So this sound guy on the other side of the wall cant hear me and i cant really hear him. And yo might be wondering why. I can move and bounce off molecules but the molecules being so tightly packed it lets little to no sound through.
Since I move the molecules the around me its hard to move through something such as this wall.
Now lets move on. If you scream in space no one can hear you. There aren't any molecules in space for me to move so out here I don't really exist
Well lets say your on the bus and your trying to get your friends attention walking by outside. you can yell and they can here you. even thought I am a mechanical wave the vibrations can move through the window and a very muffled voice of your friend can be heard.
Well thanks for reading about me!! Now you know how you can hear your TV show and your friends when you hang out. Sound its a wonderful wave.