Sound

Sound

1. Acoustics is the science that studies sound

   • Sound is a mechanical wave propagating throuh an elastic medium

2. The sound is produced by a source of vibration

3. The speed of sound in air is 340 m/s in normal conditions

   • The speed of sound in solid is (around 5000m per second in the iron)
   • In liquids 1500 m per second in water
   • In gases the sound traveld at 330 m/s at temperature of 0°C

4. Let bel be a big unit, the decibel unit is the most used 1=bel =10 decibels(dB)

5. The characteristics of the sound waves : Tone, timbre, loundness or intensity

6. The measurement of the sound is decibels

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