此外，发动机位于后部上表面，提供了自然的噪声屏蔽，使得配置在起飞和着陆期间更安静。

In addition, the engines are located on the aft upper surface, providing natural noise shielding that makes the configuration quieter during takeoff and landing.

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所以作者主要是应用一维弹性波理论及板壳振动理论对局部噪声屏蔽进行理论研究，并用试验来验证理论分析的可靠性。

So one-dimensional elastic wave and plate vibration response theory are mainly applied to study the structure and experiments are made to verify the validity of the theory.

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必须牢固地安装单元的电极，以避免其振动和移动而产生噪声和干扰。此外，将引线屏蔽也有助于降低干扰。

The electrodes of the cell must be rigidly mounted to prevent vibration and motion from creating noise and pickup. Additionally, shielding the leads to the electrodes helps reduce interference.

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