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　　研究人员已经确定了内置谐振器如何在各种情况下处理振动。谐振器是帮助管理振动的设备——一些车辆使用它们来限制汽车消音器发出的声音，而一些桥梁和建筑物则使用它们来限制这些结构的噪音和运动。谐振器使用类似弹簧的振动来控制和改变振动——一些吸收和中和它们，而另一些放大并将它们引导到特定的地方。

　　先前的研究研究了如何使用谐振器来控制穿过墙壁的声音或减少移动车辆的振动。这些研究的重点是在现有结构或车辆部件上添加谐振器。这项新研究发现，将谐振器直接切割到墙壁或车辆材料中可以抑制可能传播的振动。

　　研究人员将谐振器切割成矩形丙烯酸板，以确定如果将谐振器直接切割成材料而不是以后添加，会发生什么情况。该研究没有直接将切入式谐振器与添加的谐振器进行比较。切入式谐振器比添加的谐振器更流线型，并且对于空间重要的应用（例如在飞机或墙壁的建造中）将是更好的选择。

　　研究人员使用不同的机制将板固定在适当的位置——有些被紧紧夹住，有些悬浮在空气中，有些则由支撑物支撑。然后，他们使用机械化锤子敲击金属板，并测量锤子撞击后每个金属板产生的振动力。他们保持一个盘子不变作为对照。

　　他们发现，在未改变的板上，振动比在内置谐振器的板上传播得更远。他们的实验表明，谐振器有助于板弯曲并吸收来自锤子的振动。

　　这些实验旨在测试一种设计，该设计可以具有多种实际应用，并可用于隔音墙。它还可以用来制造飞机框架，自动减少进入机舱的声音；例如，一种类似三明治的结构，由一块轻质面板和一个内置谐振器组成，位于两块石膏板之间或分层在飞机壁内。这可用于减少整个系统的振动，而不会降低空气动力学或效率，因为质量已被消除。

　　无论板如何固定到位，谐振器也能够吸收振动。

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　　Researchers have determined how built-in resonators handle vibrations under a variety of scenarios. Resonators are devices that help manage vibrations — some vehicles have them to limit the sound emitted from a car’s muffler and some bridges and buildings use them to limit noise and movement from those structures. Resonators use spring-like oscillation to control and change vibrations — some absorb and neutralize them while others amplify and direct them to specific places.

　　Prior studies examined how to use resonators to control sound that is passed through walls or to reduce the vibrations of moving vehicles. Those studies focused on adding a resonator to an existing structure or vehicle part. The new study found that cutting resonators directly into the wall or vehicle material suppressed the vibrations that could spread.

　　The researchers cut resonators into rectangular acrylic plates to determine what might happen if resonators were cut directly into a material, rather than added on later. The study did not directly compare cut-in resonators to those that are added on. Cut-in resonators are more streamlined than those that are added on and would be better options for applications where space matters — in the construction of an airplane or a wall, for example.

　　The researchers held the plates in place using different mechanisms — some were clamped tightly, some were suspended in air, and some were held up by supports. Then they used a mechanized hammer to strike the plates and measured the force of the vibrations created by each plate after the hammer’s impact. They kept one plate unaltered as a control.

　　They found that vibrations traveled farther on the unaltered plates than on those with built-in resonators. The resonators, their experiments showed, helped the plates flex and absorb the vibrations from the hammer.

　　The experiments were built to test a design that could have multiple real-world applications and could be used to soundproof walls. It also could be used to build airplane frames that automatically lessen the sound that enters the cabin; for example, a sandwich-like construction consisting of a lightweight panel with a built-in resonator between two panels of sheetrock or layered inside the walls of an airplane. This could be used to reduce vibration of the entire system without reducing the aerodynamics or efficiency since mass is eliminated.

　　The resonators also were able to absorb vibrations regardless of how the plates were held in place.