Sound

Sound

1. Pitch (Frequency),Loudness(amplitude)

   • the shorter the length of vibration, the higher the pitch

2. Sound is formed by vibrations

   • Sound is a longditudianl wave
     • sound make compression and rarefraction

3. characteristics

4. Sound needs a medium to travel from one point to another

5. travels fastest in solid as particles are closest together as compared to liquid and gases

6. Factors affecting the distictiveness of an echo

   • smoothness,hard,flat

7. An echo is a repetition of a sound due to the reflection of sound

8. speed=distance/time

9. when sound travels through a medium,a series of compression and rarefaction move away from the source

   • rarefraction
     • compression
       • A region where the particles are pulled apart,resulting in a pressure lower than the surrounding pressure
     • a region of the particles are pushed together,resulting in a pressure higher than the surrounding pressure