M 2 SILENT: Enabling Multi-user Silent Speech Interactions via Multi-directional Speakers in Shared Spaces
Juntao Zhou, Dian Ding, Yijie Li, Yu Ying Lu, Yida Wang, Yongzhao Zhang, Yi‐Chao Chen, Guangtao Xue · 2025
We introduce M 2 Silent, which enables multi-user silent speech interactions in shared spaces using multi-directional speakers.Ensuring privacy during interactions with voice-controlled systems presents significant challenges, particularly in environments with multiple individuals, such as libraries, offices, or vehicles.M 2 Silent addresses this by allowing users to communicate silently, without producing audible speech, using acoustic sensing integrated into directional speakers.We leverage FMCW signals as audio carriers, simultaneously playing audio and sensing the user's silent speech.