EchoNose is a minimally-invasive wearable device capable of detecting silent speech words and articulators (such as tongue movement) using active acoustic sensing through the nasal cavity. This effect is possible due to the interconnectivity of the upper respiratory tract cavities. We explore the feasibility of EchoNose by (1) continuously tracking speech articulators using an electromagnetic articulograph (EMA) for ground truth, and (2) conducting a silent speech user study with 6 participants comparing EchoNose against CV performance on a list of 21 common words and 10 “tongue-specific” words.