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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 ...
The State Water Resources Control Board announced last Monday that a new plant with two filtration systems will treat water piped in from the California Aqueduct, which is more than 20 miles away.
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.
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 ...
The water treatment plant and the new facilities that would be paid for, if the referendums pass, cost an estimated total of $315 million. City Manager Jonathan Evans said there's another $98 ...
Primary treatment is possible for flows up to 440 million U.S. gallons (1,700 million liters) per day. [10] The plant begins with basic filtration and primary treatment. Secondary treatment consists of aeration tanks and clarifier tanks. Water is disinfected with hypochlorite before it is released into the Puget Sound. [11] [12]
The Multi-barrier approach is a key paradigm for ensuring safe drinking water in jurisdictions such as Ontario, elsewhere in Canada, and New Zealand. [1] It is defined as, [ 2 ] An integrated system of procedures, processes and tools that collectively prevent or reduce the contamination of drinking water from source to tap in order to reduce ...
Through the NACA program, he became the first human to officially break the sound barrier on October 14, 1947, when he flew the experimental Bell X-1 at Mach 1.05 at an altitude of 45,000 ft (13,700 m), for which he won both the Collier and Mackay trophies in 1948. He then went on to break several other speed and altitude records in the ...