Chapter 3: Sound

Chapter 3: Sound

1. Since ancient times, sounds have helped to describe situations.

2. The ear is so important, because is a way of guide.

3. Hertz

   • What is a hert?
     • Is the unit of frequency, is the equivalen to a cycle per second.
       • infrasound
         • 0Hz-20Hz
           • Elephans and moles
       • Human
         • 20Hz-20,000Hz
           • Humans
       • Ulltrasound
         • 20,000Hz-160,000Hz
           • Dolphins and bats

4. What is sound?

   • Sound is all the vibrations passing into the air in form of waves.

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