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In 1957 Willard Meeker developed a working model of active noise control applied to a circumaural earmuff. This headset had an active attenuation bandwidth of approximately 50–500 Hz, with a maximum attenuation of approximately 20 dB. [3] By the late 1980s the first commercially available active noise reduction headsets became available.
Flight paths of aircraft departing Hollywood Burbank Airport changed as part of the Federal Aviation Administration's airspace modernization program called NextGen.An independent analysis confirmed in October 2018 that "a connection was found between the [NextGen] implementation and the increase in the number of flights over areas south of the 101 Freeway.".
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
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Burbank Airport–North station is a Metrolink train station in the city of Burbank, California. [3] Passengers on the Antelope Valley Line , which travels between Lancaster, California and Union Station in downtown Los Angeles , can connect with the Hollywood Burbank Airport .
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