Table of contents

1. What is sound:
   • different kinds of sound
   • create sound
   • sound waves
   • frequency
2. Sounds with different pitch:
   • range of frequencies
3. Sounds with different loudness
   • amplitude
   • measuring loudness
4. Sound we can hear
5. Sound we can´t hear / ultrasound:
   • signal generator
   • ultrasound scans
6. Through which materials do sound waves pass?
   • solids, liquids, gases
7. Sound waves may be channeled:
   • reflection of sound
   • stethoscope
   • echo
8. The speed of sound
9. Sound all around us:
   • noise
   • music
10. Keywords: English-German