Mechanical waves and some technological applications of sound mechanical waves

The mechanical waves

The mechanical waves are the waves which propagate through a material medium (the solid, the liquid, or the gas) at a wave speed which depends on the properties of that medium.

The mechanical waves need a medium to travel through, They do not travel through the free space (the vacuum).

The mechanical wave is the wave which is an oscillation of the matter, and therefore it transfers the energy through the medium, While the waves can move over the long distances.

the movement of the medium of the transmission, the material is limited, So The oscillating material does not move far from its initial equilibrium position.

The mechanical waves transport the energy that propagates in the same direction as the wave, Any kind of wave (the mechanical or the electromagnetic) has a certain energy, They can be produced only in the media which possess elasticity and inertia.

The mechanical waves differ from the electromagnetic waves because the energy is transferred through another medium like the metal in a slinky, rather than through the vacuum such as the light through the outer space.

The mechanical waves act as the propagation of the disturbance through the material medium due to the repeated periodic motion of the particles of the medium.

The water waves and the sound waves are examples of the mechanical waves, There are three types of mechanical waves such as the transverse waves, the longitudinal waves, and the surface waves.

The mechanical waves are characterized by:
  1. The vibration of the medium particles produce mechanical waves.
  2. Their speed is relatively low (The speed of the sound is about 340 m / s).
  3. They need a medium (such as the liquids, the gases and the solids) to transfer through.
The water wavesThe water waves
Applications of sound mechanical waves
  • The sound waves (The ultrasonic waves) are used in examining and curing the sets of the human body.

  • The musical instruments : 

    The stringed musical instruments (contain the strings) such as the violin, The lute and The guitar. 

    The sound waves are very important in the pneumatic musical instruments such as the flute or the reed pipe.

  • The sound waves are used in the amplifiers and the sets of distributing and controlling the sound used in the broadcasting studios.

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