RF VOICE SENSING — WiFi CSI
CSI Vibration at Voice Frequencies
CSI Voice Active—
RF Vibration Energy—
Detected Formants—
MethodWiFi 7 CSI bandpass 85-3400Hz
Speech vibrates throat/face at 85-3400Hz. These mm-scale displacements disturb WiFi multipath paths at the same frequencies. CSI at 1000+ sps → bandpass filter → voice signal. Real: needs Qualcomm Aware SDK.