Page 111 - 《应用声学》2025年第2期

第 44 卷 第 2 期 Vol. 44, No. 2
2025 年 3 月 Journal of Applied Acoustics March, 2025

⋄ 研究论文 ⋄

能量对比度控制方法在防激光窃听中的应用 ∗

韩 璐 1,2 张桃明 3 吴 鸣 1,2† 高小轶 1,2 杨 军 1,2†

(1 中国科学院声学研究所 噪声与振动重点实验室 北京 100190)
(2 中国科学院大学 北京 100049)
(3 民航机场建设集团西南设计研究院有限公司 成都 610202)
摘要：通过在窗户玻璃上施加振动产生干扰信号可以掩盖掉人声信号，达到防激光窃听的目的。同时希望在
驱动玻璃振动的同时，降低对房间内说话人的噪声干扰。因此提出一种基于能量对比度控制的方法，降低对
空间中特定区域的辐射声场。用作动器阵列驱动平板振动，通过作动器到振动和声场控制点的传递函数，最
大化振动平板的平均动能与目标区域内声场的平均声能之比，优化作动器阵列的权向量。利用矩形铝板进行
实验，采用 4 个作动器，通过算法控制后相比于不做控制的情况，在 100 ∼ 4000 Hz 范围内，平均振动动能相同
的条件下，辐射声能量能够降低 9.85 dB。说明该方法在提供同样振动能量的同时，减弱了对目标区域内的
声场辐射。
关键词：能量对比度控制；作动器阵列；平板声辐射；防激光窃听
中图法分类号: TB535 文献标识码: A 文章编号: 1000-310X(2025)02-0371-06
DOI: 10.11684/j.issn.1000-310X.2025.02.011

Application of energy contrast control method in anti-laser-eavesdropping

HAN Lu 1,2 , ZHANG Taoming , WU Ming 1,2 , GAO Xiaoyi 1,2 and YANG Jun 1,2
3
(1 Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Beijing 100190, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)
(3 CACC Southwest Design and Research Institute Co., Ltd., Chengdu 610202, China)

Abstract: By driving vibration of the window glass to produce interference signals can mask the voice signal,
to achieve the purpose of anti-laser-eavesdropping. It is also desired to reduce noise interference to the speaker
in the room, when the glass is driven. Therefore, an energy contrast control method is proposed to reduce
the radiated sound field to the specific region in space. An array of actuators is used to drive the vibration
of a flat panel. The weight vector of the actuator array is optimized by maximizing the ratio of the average
kinetic energy of the vibrating panel to the average acoustic energy of the sound field in the target area using
the transfer functions from the actuators to the control points of the vibration and acoustic fields. Experiment
is conducted using a rectangular aluminum panel and 4 actuators. With the same average kinetic energy, the
radiated sound energy of the proposed method is reduced by 9.85 dB in the frequency range of 100 Hz to
4000 Hz compared to the case without control. It is shown that the method can attenuate the radiated sound
field in the target region while providing the same vibrational energy.
Keywords: Energy contrast control; Actuator array; Flat panel sound radiation; Anti-laser-eavesdropping

2023-11-10 收稿; 2024-02-16 定稿
∗ 智能感知条件下机场鸟击综合防范系统研究项目
作者简介: 韩璐 (1997– ), 女, 河北衡水人, 博士研究生, 研究方向: 信号与信息处理。
† 通信作者 E-mail: mingwu@mail.ioa.ac.cn; jyang@mail.ioa.ac.cn