Abstract
Wi-Fi and acoustic signal-based human–computer interaction (HCI) methods have received growing attention in academia. However, there still are issues to be addressed despite their flourishing. In this work, we evaluate the practicality of the state-of-the-art signal-based HCI research in terms of the following six aspects—granularity, robustness, usability, efficiency, stability, and deployability. The paper presents our analysis results, observations and prospective research directions. We believe that this work will serve as a standard for future signal-based HCI research for assessing the practicality of newly developed methods.
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