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2. Noise barrier - Wikipedia

   en.wikipedia.org/wiki/Noise_barrier

   A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect rich people from noise pollution. Noise barriers are the most effective method of mitigating roadway , railway, and industrial noise sources – other than cessation of the source activity or use ...

3. Soundproofing - Wikipedia

   en.wikipedia.org/wiki/Soundproofing

   Residential sound programs aim to decrease or eliminate the effects of exterior noise. The main focus of a residential sound program in existing structures is the windows and doors. Solid wood doors are a better sound barrier than hollow doors. [9] Curtains can be used to dampen sound, either through use of heavy materials or through the use of ...

4. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   The STC or sound transmission class is a single number method of rating how well wall partitions reduce sound transmission. [3] The STC provides a standardized way to compare products such as doors and windows made by competing manufacturers. A higher number indicates more effective sound insulation than a lower number.

5. A Kentucky first: State tests new transparent sound barriers ...

   www.aol.com/kentucky-first-state-tests...

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6. Noise control - Wikipedia

   en.wikipedia.org/wiki/Noise_control

   The most fertile areas for roadway noise mitigation are in urban planning decisions, roadway design, noise barrier design, [14] speed control, surface pavement selection, and truck restrictions. Speed control is effective since the lowest sound emissions arise from vehicles moving smoothly at 30 to 60 kilometers per hour.

7. 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.