Best Ultrasonic Audio Jammer for Conference Room

Acoustic sound‑masking systems — Professional systems (ceiling speakers + controller) add broadband background noise tuned to human speech frequencies so accidental overhearing or casual recording is rendered unintelligible. Used widely in offices and boardrooms.

White‑noise / privacy generators (consumer & pro) — Standalone machines that produce broad noise to mask speech for small rooms; cheaper and faster to deploy than full masking systems.

Room soundproofing & acoustic treatment — Add absorptive panels, bass traps, door seals and double‑glazed windows to reduce sound leakage (prevents both outgoing and incoming audio). Very effective and permanent.

Electronic meeting discipline + procedural controls — Enforce rules: no unauthorized recorders, require devices off/collected at entry, NDAs and counter‑surveillance checklists before sensitive meetings.

Technical detection (sweep & detection) — Deploy RF/bug detection (TSCM) and physical sweeps to discover covert recorders or wiretaps—legal and ethical when done by trained professionals.

Secure communications & encryption — Use end‑to‑end encrypted conference systems and prevent remote audio capture by controlling network/AV endpoints and firmware updates.