Across
- 5. Move backwards and forwards.
- 7. A reflection of sound.
- 8. Sound can be heard through a _____________ , liquid or gas.
- 11. The number of vibrations every second.
- 13. This part of the ear changes sound energy into electrical energy.
- 14. A low pitch note has a _____________ frequency.
- 15. Sound can’t travel through this.
Down
- 1. The _____________ nerve carries impulses to the brain.
- 2. The ears do this.
- 3. This causes an echo.
- 4. This travels slower than lightning during a storm.
- 6. Materials which stop sound reflections do this.
- 9. Unit for loudness.
- 10. Unit for frequency.
- 12. The tube that sound waves travel along to get to the eardrum