3. Answer the following questions. a. Explain the property 'Sound can get absorbed with the help of an example.
Answers
While propagating from air into an absorbing material, the sound wave could experience reflection or absorption thereby losing energy, experiencing dampening effects. In a polymeric material, sound absorption takes place by transforming sound waves into heat. Sound absorption is necessary for soundproofing.
If you spill grape juice, you clean it up by wiping a wet sponge over the grape juice spill. The sponge has just absorbed the grape juice. The same thing happens to sound. As sound travels through a medium such as water, it gets absorbed – caught by the molecules within the medium.
Examples are Acoustic Foam, Acoustic Fabric Panels, Sound-Absorbing Curtains, Sound Blankets & Moving Blankets, Sound-Absorbing Underlayment, Acoustic Bass Traps, Fiberglass Insulation, and Acoustic Polyester Panels.