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1 . 智能主动降噪耳机工作的原理是通过耳机两端的噪声采集器采集周围的噪声,然后通过主动降噪芯片生成的声波来抵消噪声(如图).已知噪声的声波曲线是
,通过主动降噪芯片生成的声波曲线是
(其中
),则
( )
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992613741322240/2995556339048448/STEM/1855190a-5f8f-47fc-bf4b-ffb832947ca0.png?resizew=283)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7cd93b34f15e13f2308a8c3ebf3d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b659146043ee17e549578998318b2c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca83975f6ac01787d50e522de803400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992613741322240/2995556339048448/STEM/1855190a-5f8f-47fc-bf4b-ffb832947ca0.png?resizew=283)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-06-06更新
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7卷引用:吉林省吉林市普通高中2022届高三第四次调研测试理科数学试题