Sound

Sound

1. Sound made by object vibrating

   • vibrations create sound waves
   • there must be a solid, liquid or gas medium to transmit sound waves
     • sound doesn't travel in space

2. sounds can be loud or soft

   • loud sounds have more energy
     • loud sounds have a higher amplitude

3. sounds can have a high or low pitch

   • Frequency is a measure of pitch
     • object vibrating faster
       • sound waves closer to each other
     • Unit : Hertz (Hz)