Sound Waves

Sound Waves

1. Properties of Sound Waves

   • Sound waves can only travel through a solid, liquid or glass and they can't travel through empty space
     • You know when sound is produced when an object or substance vibrates

2. Longitudinal waves

   • A longitudinal wave is a wave that moves in the same direction as the direction the particles are vibrating

3. Loudspeakers

   • Loudspeaker sound waves are produced by all vibrating objects.
     • They work by making electrical energy into kinetic energy
       • Doing this moves the cone and it creates sound waves.

4. Reflection

   • Sound wave scan reflect off of surfaces
     • Sound reflections are heard as echoes
       • Hard and smooth surfaces are particularly goes at reflecting sound - this is the reason why lots of echoes are produced in empty rooms
         • Soft and rough surfaces are good at absorbing sound.
           • This is why lots of echoes aren't usually produced in rooms with carpets and curtains.

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