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Q: The technique used to absorb noise by using soft and porous surface is called :
  • A. Sound protection
  • B. Audio security
  • C. Rotation
  • D. Absorption
Correct Answer: Option A - The technique used to absorb noise by using soft and porous surface is called sound protection. When they are soft material, they absorb due to the deformation that occur where they are porous material, they absorb by the vibration of the air contained in it pores.
A. The technique used to absorb noise by using soft and porous surface is called sound protection. When they are soft material, they absorb due to the deformation that occur where they are porous material, they absorb by the vibration of the air contained in it pores.

Explanations:

The technique used to absorb noise by using soft and porous surface is called sound protection. When they are soft material, they absorb due to the deformation that occur where they are porous material, they absorb by the vibration of the air contained in it pores.