SOUND

Pitch

This is how high or low a sound seems. A bird makes a high pitch. A lion makes a low pitch.

Sounds also are different in how loud and how soft they are.
The more energy the sound wave has the louder the sound seems.




 You can hear loud and soft sounds.We can do noise by example:play a drum,scream.
                        


see more in http://www.mediacollege.com/audio/01/sound-waves.html
put START and you will see the saound waves...LEARN MORE!