Headphones placed around the neck are an effective sound source for testing how well hearing protection devices reduce noise.

Abstract: This article proposes a novel dynamically tunable plasma-energy selective surface (Plasma-ESS) structure for protecting electronic and communication equipment from high-power microwave ...

Abstract: To address the issue of difficulty in activating main and branch protection in low-voltage distribution networks due to inherent residual currents and repeated neutral grounding, this paper ...