10 amazing facts about sounds

Sounds - this is the first thing a person faces, appearing in the light. And the last thing he heard, leaving the world. But between the first and second passes a lifetime. And all of it is built on the noises, colors, saber, roar, music, in general, a complete cacophony. < Website


1. Their level is measured in decibels (dB).

• Normal conversation - about 45-55 dB. Sound in the office - 55-65 dB. The noise on the street - 70-80 dB. Motorcycle with a silencer - 85 dB. jet at the start makes a noise of 130 dB. A Rocket - 145 dB. 2. Sound and noise are not the same.
  3. Our voice in a recording, because we hear "not the ear».
  And while listening to the part involved only the outer channel.
  
  4. Some people may hear the sound of their rotation eyeballs.
  5. The noise of the sea, we hear through the seashell,
  6. The deaf can still hear.
  7. Sound can be converted into light.
  8. "A" - the most common in the world of sound.
  9. Norma is when a person hears a softly spoken words
  10. We can not ignore that lose their hearing.
  
  
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