
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。 A US federal grand jury has indicted one current and one former Department of Homeland Security (DHS) worker in connection with an alleged scheme to silence critics of the Chinese government, in which a total of five people were involved, according to the Justice Department.,The indictment revealed on Thursday that DHS employee Craig Miller and Derrick Taylor, a retired DHS agent working as a private investigator, are accused of accessing and providing information about Chinese activists from a restricted government database to two more defendants, who then used the records to target the victims.,Beijing Says China Ready to Work With US Partners on Improving Bilateral Relations30 October 2020, 11:47 GMT,US prosecutors claimed that Fan “Frank” Liu, Qiang “Jason” Sun, and Matthew Ziburis perpetrated a campaign to “spy on, harass and discredit” dissidents living in the US and to crush criticism of Beijing.,According to the prosecutors, an unspecified artist in California was among the “dissidents” allegedly targeted by the defendants. The prosecutors argued that Ziburus posed as a dealer interested in buying the painter’s artwork, and secretly installed surveillance cameras and GPS devices at the artist’s studio and in his car. The defendants purportedly planned to destroy the dissident’s artwork.,Referring to the indictment, Matthew Olsen, Assistant US Attorney General for National Security, pledged that he and his colleagues “will defend the rights of people in the United States to engage in free speech and political expression, including views the PRC [People’s Republic of China] government wants to silence.”,“As charged, these individuals aided agents of a foreign government in seeking to suppress dissenting voices who have taken refuge here. The defendants include two sworn law enforcement officers who chose to forsake their oaths and violate the law,” Olsen added.,The remarks followed the Chinese Foreign Ministry describing the US as “the biggest threat to world peace, stability and development.” Foreign Ministry spokesperson Zhao Lijan told reporters that “the relevant US politician has been playing up the so-called China threat to smear and attack China.”,“We urge this US official to have the right perspective, see China’s developments in an objective and reasonable manner, and stop spreading lies and stop making irresponsible remarks," Zhao stressed.,He referred to FBI Director Christopher Wray earlier delivering a speech at the MI5 building in London, where he warned of the "complex, enduring and pervasive danger" that China purportedly poses to both the US and the UK.,China Against Defining Relations With US as 'Competition'7 October 2021, 08:24 GMT,Wray said that the Chinese government “poses an even more serious threat to Western businesses than even many sophisticated business people realize,” arguing that the "danger" from China is "complex and growing.”,“The Chinese government is trying to shape the world by interfering in our politics, and those of our allies. All of that is to say – China poses a far more complex and pervasive threat to businesses than even the most sophisticated company leaders realize,” the FBI director pointed out.,He spoke after America’s National Counterintelligence and Security Center (NCSC) accused China of seeking to “exploit US subnational relationships to influence US policies and advance PRC geopolitical interests.”。

二 | 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。

三 | 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。

四 | 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。

五 | 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。

六 | 视频:(如果移动客户端用户无法观看视频,请单击此处查看)。
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