Conventional loudspeakers generate sound through the vibration of a diaphragm, attached to a rigid frame through elastic suspensions. Although such construction is satisfactory for sound diffusion in steady environments, it is likely to fail in harsh conditions, which is often the case for active noise control applications. Plasma-based actuators appear to be a promising alternative since they do not involve any fragile moving parts. In this paper, a positive corona discharge actuator in a wire-to-mesh geometry is proposed in the perspective of active noise control applications, as it is capable of generating sufficient sound pressure levels with limited signal distortion. The study introduces analytical and numerical models aiming at characterizing the sound field generated by the corona discharge actuator. The numerical simulation can facilitate the designing of such transducers. The acoustic power of the experimental prototype is increased through the optimization of emitter ...

中文翻译：

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开发用于主动噪声控制应用的等离子电声致动器

传统的扬声器通过振动膜片产生声音，振动膜片通过弹性悬架固定在刚性框架上。尽管这种结构对于稳定环境中的声音扩散是令人满意的，但它可能在恶劣的条件下会失效，这在主动噪声控制应用中通常是这样。基于等离子体的致动器似乎是一种有前途的选择，因为它们不涉及任何易碎的运动部件。在本文中，从有源噪声控制应用的角度提出了线对网几何形状的正电晕放电致动器，因为它能够产生足够的声压级且信号失真有限。这项研究引入了分析和数值模型，旨在表征电晕放电致动器产生的声场。数值模拟可以促进这种换能器的设计。通过优化发射器，可以提高实验原型的声功率。