What is Sound?

What is Sound?

1. Sound travels in waves caused by vibrating objects

2. You hear sound when vibrations reach your eardrum

3. A form of kinetic energy

4. Frequency is the number of complete vibrations each second - measured in hertz

5. Pitch is the degree of highness or lowness a sound produces

6. The loudness of a sound is how high or low it measures on the decibel scale - the volume

7. The greater the amplitude of the wave/vibration, the more energy it carries, which means it will be louder

8. An oscilloscope is a machiene used to display sound waves

   • the sound vibrates with a high frequency (many waves per second) then it has a high PITCH
   • The waves on the oscilloscope will be much taller if the sound has a higher amplitude
   • If a sound has a low frequency the waves will be more spaced out and less narrow

9. Wave length is the distance it takes for the wave pattern to repeat

10. Travels much faster than the speed of light