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耳机不够。Bose为汽车引入了降噪技术_我的网站

一 | 1月10日，Bose希望将其备受赞誉的降噪技术从耳机到汽车。

二 |     COPENHAGEN, Denmark -- Gale-force winds and floods struck several countries in Northern Europe as the region braced for more heavy rain on Friday. In Scotland, one person was reported dead after being swept into a river and authorities searched for a man thought to be trapped in his vehicle.The gale-force winds are expected to hit hardest in the eastern part of Denmark's Jutland peninsula and the Danish islands in the Baltic Sea. But the northern part of the British Isles, southern Sweden and Norway, and northern Germany are also on the path of the storm, named Babet by U.K.’s weather forecaster, the Met Office.Eastern Scotland continued to bear the brunt of the stormy weather. On Friday, the Met Office issued a new “red” warning for parts of eastern Scotland for further flooding throughout Saturday.A 57-year-old woman died Thursday after being swept into a river in the region of Angus, where 400 homes were evacuated. A police spokeswoman said they were informed Thursday about a man within a vehicle trapped in floodwaters in nearby Marykirk.With the worst of the heavy rain in Scotland set to diminish over the coming hours, emergency services warned that rivers may still rise and breach flood defenses. Some parts of the town of Brechin are only accessible by boat after its flood defenses were overwhelmed by the heavy rainfall, raising concerns about further loss of life.“I cannot stress how dangerous conditions are in Brechin in particular,” said Scotland’s first minister, Humza Yousaf.Wind gusts in excess of 60 mph (100 kph) were likely on Friday. Several major road sections and rail routes were closed in Scotland, while air passengers were facing flight cancellations.On Thursday, the Met Office issued a rare red alert — the highest level of weather warning — for parts of Scotland, predicting “exceptional rainfall” and “danger to life from fast-flowing or deep floodwater.” The last red alert in the U.K. was issued in 2020.The storm has already brought more than a month’s worth of rain in the worst-affected regions in Scotland and is set to pummel many parts of northern England over Friday.“It will probably be some kind of historic event,” Hans Peter Wandler of the Danish Meteorological Institute told the Ekstra Bladet daily. “But we’ll have to wait until it’s over to see if it’s going to be a two-year event or a 100-year event.” Police in southern Denmark — the Danish region expected to be the worst hit — said that a number of road sections in the low-lying areas were flooded and a few trees have also fallen. Citing the Danish Meteorological Institute — which issued a warning for “very dangerous weather,” its highest — police in southern Denmark said that the water level would continue to rise. Sea levels in parts of inland Danish waters were expected to rise up to 240 centimeters (nearly eight feet) above normal. In neighboring Sweden, meteorologists warned of the risk of extensive flooding which may cause limited access on roads and railways along the southern coasts of the Scandinavian country. Water levels were expected to begin dropping again on Saturday morning, Swedish meteorologists said.A bridge near Norway’s second-largest city was protectively closed, the Bergens Tidende newspaper said. Ferries across the region were canceled and air traffic was hampered, with delays and a few cancellations. The Swedish Transportation Authority suspended service of several train and bus lines in southern Sweden, because of the weather, prompting Skanetrafiken, the operator of the local transit system, to recommend ”avoiding travel on public transport.””Some regional bus routes will be canceled and there is a risk that both regional and replacement buses in service may also be canceled at short notice,” Skanetrafiken said on its website.In Germany, some streets and squares were flooded in the cities of Flensburg, Kiel and Wismar on the Baltic coast. Fallen trees caused some disruption, including a railway line. Ferry operator Scandlines suspended services on its Roedby-Puttgarden and Gedser-Rostock routes between Denmark and Germany.On Germany’s North Sea coast, the high winds had the opposite effect to the flooding on the Baltic coast, pushing the water further out and leading to very low water levels. Ferries to some North Sea islands were canceled.___Pan Pylas in London, and Geir Moulson in Berlin, contributed to this report.___Follow AP’s climate and environment coverage at https://apnews.com/hub/climate-and-environment。这家总部位于马萨诸塞州弗里明翰的公司刚刚推出了一项名为“安静舒适”的新技术，该技术声称能够测量车辆振动以消除日常驾驶中的噪音。Bose指出，随着汽车的重量越来越轻，电动汽车越来越多，这种降噪技术可能会受到越来越多的关注。坐在安静的电动汽车里的司机比坐在嘈杂的内燃机车更容易受到道路噪音的影响。Bose将这项技术定位为展望未来，因为道路上会有更多的电动汽车。那么它是如何工作的呢？传统的车辆降噪方法包括使用更厚的绝缘材料或专用轮胎，以尽量减少在崎岖不平的道路上行驶时产生的噪音。但这些方法增加了车辆重量，降低了燃油效率。Bose使用加速度计、专有的信号处理软件、麦克风和汽车内置音响系统的组合来“电子控制不需要的声音”。Bose说：安装在车身上的加速度计使Bose算法能够连续测量产生噪音的振动。然后，利用该信息计算出通过车辆扬声器传输的消声信号，以降低目标噪声。放置在驾驶室中的麦克风监控残余噪音水平，允许系统调整控制信号以优化不同道路上的性能，并随车辆老化自动调整。虽然Bose有一个非常著名的降噪耳机，但它的车是一个非常不同和复杂的环境。该公司指出，自2010年以来，其汽车部门已向汽车制造商提供了ehc，这是一项用于降低劣质发动机噪音的高目标技术。Bose表示，在降噪技术的发展过程中，将与汽车制造商合作，将该技术直接安装在汽车生产过程中，首批支持安静舒适的汽车将于2021年底投产。

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