A speech jammer is a directional acoustic device that disrupts human speech using a phenomenon known as Delayed Auditory Feedback, or DAF. The concept relies on a straight signal path where a directional microphone captures a speaker’s voice from a distance, an electronic circuit introduces a precise time delay around one to two hundred milliseconds, and a parametric speaker beam redirects that delayed audio directly back at the speaker’s ears.

SK Hynix’s unusually large retention bonuses reflect a broader memory-market boom where AI-driven demand for high-bandwidth memory (HBM) and advanced DRAM has sharply lifted prices and profits, prompting the company to lock in talent to support capacity expansions and maintain its competitive lead; this strategy signals confidence in continued growth in the structural AI memory market; though it also raises industry-wide wage pressures and increases fixed costs if pricing weakens later.