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2. 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 ...

3. Noise barrier - Wikipedia

   en.wikipedia.org/wiki/Noise_barrier

   The sound tube in Melbourne, Australia, designed to reduce roadway noise without detracting from the area's aesthetics.. A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants of sensitive land use areas from noise pollution.

4. Noise control - Wikipedia

   en.wikipedia.org/wiki/Noise_control

   Using a combination of sound absorption materials, arrays of microphones and speakers, and a digital processor, a restaurant operator can use a tablet computer to selectively control noise levels at different places in the restaurant: the microphone arrays pick up sound and send it to the digital processor, which controls the speakers to output ...

5. Sound baffle - Wikipedia

   en.wikipedia.org/wiki/Sound_baffle

   A sound baffle is a construction or device which reduces the strength (level) of airborne sound. Sound baffles are a fundamental tool of noise mitigation, the practice of minimizing noise pollution or reverberation. An important type of sound baffle is the noise barrier constructed along highways to

6. How to Soundproof Your Windows - AOL

   www.aol.com/news/soundproof-windows-160216668.html

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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.