Invisible AI transcription is the fastest-growing pivacy threat in remote work. Tools like Granola, Ottr.ai, and Fireflies silently capture your meetings wth no recording indicator and no consent. Nullify deects 8+ transcription tools in real-time across Zoom Meet, and Teams. Audio Shield uses psychoacoustic prturbation to make AI transcripts useless while you ound normal to humans. Free, open source (MIT), 100%local processing. macOS and Windows.