Smart Audio Glasses Privacy & Acoustic Field Lab
Simulate how open-ear speakers, reverse-phase acoustic cancellation, and multi-mic beamforming protect voice privacy and prevent bystander eavesdropping across real ambient environments.
Live Acoustic Radiation & Pickup Field
Dipole Phase Cancellation
Meta's and other modern smart glasses use dual speaker openings per temple. The secondary opening radiates audio 180° out-of-phase, creating destructive wave interference that cancels leaked sound beyond 30 centimeters while directing audio straight into the wearer's ear canal.
Multi-Mic Beamforming Array
By spacing five microphones along the frame (nose bridge, temple arms, and hinges), the digital signal processor (DSP) measures microsecond time-of-flight delays. It creates a focused acoustic cone on the wearer's mouth while suppressing ambient voices and bystander speech by up to 24 dB.
AI Agent Privacy Boundaries
Smart glasses handle sensitive sensory data. As explored in recent interviews with tech leadership, trustworthy wearables enforce an edge boundary: local wake-word buffers discard audio continuously, while cloud multimodal models only activate upon deliberate touch, key phrase, or explicit user prompt.