Related Experiment Video
Updated: Aug 4, 2025

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
Published on: May 11, 2014
Ubiquitous WiFi and Acoustic Sensing: Principles, Technologies, and Applications
Jia-Ling Huang1, Yun-Shu Wang1, Yong-Pan Zou1
1The IoT Research Center, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, 518060 China.
Abstract:
With the increasing pervasiveness of mobile devices such as smartphones, smart TVs, and wearables, smart sensing, transforming the physical world into digital information based on various sensing medias, has drawn researchers' great attention. Among different sensing medias, WiFi and acoustic signals stand out due to their ubiquity and zero hardware cost. Based on different basic principles, researchers have proposed different technologies for sensing applications with WiFi and acoustic signals covering human activity recognition, motion tracking, indoor localization, health monitoring, and the like. To enable readers to get a comprehensive understanding of ubiquitous wireless sensing, we conduct a survey of existing work to introduce their underlying principles, proposed technologies, and practical applications. Besides we also discuss some open issues of this research area. Our survey reals that as a promising research direction, WiFi and acoustic sensing technologies can bring about fancy applications, but still have limitations in hardware restriction, robustness, and applicability.
Supplementary Information:
The online version contains supplementary material available at 10.1007/s11390-023-3073-5.
Related Concept Videos
Design Example
Gene Regulation in Microbial Communities: Quorum Sensing
Field Application of Global Positioning System
Perceiving Loudness, Pitch, and Location
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
Echo
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
Doppler Effect - II

