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2. Blackout (fabric) - Wikipedia

   en.wikipedia.org/wiki/Blackout_(fabric)

   A '3-pass' blackout can be used as a decorative fabric and blackout lining all in one fabric. A '2-pass' cannot be used this way, because the black foam is visible through the fabric side of the material. In addition to blocking light, blackout fabrics also insulate and have noise-dampening qualities, due to their density and opacity.

3. Acoustical engineering - Wikipedia

   en.wikipedia.org/wiki/Acoustical_engineering

   Noise control is a set of strategies to reduce noise pollution by reducing noise at its source, by inhibiting sound propagation using noise barriers or similar, or by the use of ear protection (earmuffs or earplugs). [20] Control at the source is the most cost-effective way of providing noise control.

4. Noise pollution - Wikipedia

   en.wikipedia.org/wiki/Noise_pollution

   Noise pollution, or sound pollution, is the propagation of noise or sound with potential harmful effects on humans and animals. The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems.

5. The 10 Best Blackout Curtains For Better Sleep - AOL

   www.aol.com/lifestyle/10-best-blackout-curtains...

   Textured linen, noise-absorbing cotton—these 10 blackout curtains deliver on their simple task of blocking light. These are the ones doing it best in 2024.

6. Soundproofing - Wikipedia

   en.wikipedia.org/wiki/Soundproofing

   A pair of headphones being tested inside an anechoic chamber for soundproofing. Soundproofing is any means of impeding sound propagation.There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using ...

7. Curtain - Wikipedia

   en.wikipedia.org/wiki/Curtain

   Sash curtains are used to cover the lower sash of the windows. Rod pocket curtains have a channel sewn into the top of the fabric. A curtain rod is passed through the channel to hang. [15] Thermal or blackout curtains use very tightly woven fabric, usually in multiple layers. They not only block out the light, but can also serve as an acoustic ...