File:Channel-Sounding-Channel-sounding-requires-no-device-on-t-daadd071.jpg

Channel sounding requires no device on the subject — walls provide no barrier to RF-based presence detection.

AI-generated illustration for Channel Sounding, made with fal.ai (fal-ai/flux-2-pro).

Prompt: A floor plan view of two adjacent rooms separated by a wall, with a wireless access point in one room emitting signal wavefronts that penetrate the wall and interact with an unsuspecting occupant in the neighbouring room who carries no device. The wavefronts scatter off the person and return back through the wall toward the access point, illustrating passive through-wall sensing of an individual who has no knowledge of the measurement taking place. Style: Detailed digital illustration blending technical schematic linework with painterly atmospheric rendering, as if a scientific textbook were reimagined by a noir graphic novelist. Colour palette of deep midnight blue, charcoal black, and slate grey as foundations, accented with electric teal, bioluminescent green, and cold amber. Lighting is dramatic and directional, suggesting surveillance or laboratory environments — pools of cold light against deep shadow, with occasional glowing circuit-trace highlights. Compositions favour tight framing with layered depth: foreground technical detail dissolving into abstracted background geometry. Detail level is high but purposeful, prioritising legible structure over decorative complexity. Mood is clinical yet ominous, precise yet unsettling. No text, lettering, captions, logos, watermarks or borders unless it is a technical drawing.