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  2. Noise barrier - Wikipedia

    en.wikipedia.org/wiki/Noise_barrier

    Noise barriers have been built in the United States since the mid-twentieth century, when vehicular traffic burgeoned. I-680 in Milpitas, California was the first noise barrier. [1] In the late 1960s, analytic acoustical technology emerged to mathematically evaluate the efficacy of a noise barrier design adjacent to a specific roadway. By the ...

  3. Maju Expressway - Wikipedia

    en.wikipedia.org/wiki/Maju_Expressway

    Seri Kembangan interchange (Exit 2004A) began operations at 13 January 2016, providing access from MEX to Seri Kembangan (formerly Serdang), Puchong and Universiti Putra Malaysia (UPM). [ 2 ] Maju Expressway was planned to extend to KLIA by Dec 2019 and the route will be 18 km-long, three-lane dual carriageway and commence at Putrajaya Main ...

  4. New North Klang Straits Bypass - Wikipedia

    en.wikipedia.org/wiki/New_North_Klang_Straits_Bypass

    Maintained by Grand Sepadu Sdn Bhd (formerly known as Lebuhraya Shapadu Sdn Bhd (LSSB)) Length: 17.5 km (10.9 mi) Existed: 1996–present: History: Completed in 1998: Major junctions; West end: Northport, Port Klang: FT 5 Federal Route 5 FT 3217 Jalan Meru West Coast Expressway West Coast Expressway

  5. Sound baffle - Wikipedia

    en.wikipedia.org/wiki/Sound_baffle

    Sound baffles on the wall of a recording studio. 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. Khind Holdings - Wikipedia

    en.wikipedia.org/wiki/Khind_Holdings

    Khind Holdings Berhad (Khind; MYX: 7062) is a producer and marketer of home consumer electrical appliances and an industrial electrical company with a revenue of RM325 million in 2013.

  7. Sound barrier - Wikipedia

    en.wikipedia.org/wiki/Sound_barrier

    The sound barrier or sonic barrier is the large increase in aerodynamic drag and other undesirable effects experienced by an aircraft or other object when it approaches the speed of sound. When aircraft first approached the speed of sound, these effects were seen as constituting a barrier, making faster speeds very difficult or impossible.

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