Sound

Sound

1. 1) Sound needs a medium to travel through because something has to pass on the sound vibrations

   • 2) Sound carries energy -as glass shows
     • 3) It can be reflected and refracted just like like light
       • 4) Sound travels much slower than light
   • How sound travels

2. Amplitude

   • 1) If sound is seen on an oscilloscope it looks like a wave
     • 2) The amplitude of sound is the height of the wave
       • 3)The amplitude shows how much energy the sound has
         • 4) A large amplitude means the wave is louder

3. Frequency

   • 1) The frequency of sound is the number of compete waves that pass point per second
     • 2) It's a measure of how high pitched the note is
       • 3) A high frequency means the note is higher