Highly sensitive, source-tracking acoustic sensing is essential for effective and natural
human-machine interaction based on voice. It is a known challenge to omnidirectionally …

Acoustic and elastic waves carry a wealth of useful physical information in real world.
Sensing acoustic and elastic waves is very important for discovering knowledge in various …

The fault features of rotating machinery at the early degradation stage are always weak as a
result of interference from strong noise and irrelevant harmonics. Although traditional …

In this Letter, a single-cavity underwater acoustic metasurface unit with sub-wavelength
thickness was designed for simultaneously realizing the high refractive index in the water …

Wave invisibility has quite special meaning on marine vehicles under water, which
encourages people to search effective methods for a long history. Initiated by this point, we …

Transceiving ultra-weak sound typically relies on signal pre-amplification at the transmitting
end via active electro-acoustic devices, which inherently perturbs the environment in the …

Defective phononic crystals offer the advantage of concentrating elastic waves, thereby
enhancing the potential for piezoelectric energy harvesting (PEH). However, a key limitation …

The multi-mode and dispersion natures of elastic guided waves bring big challenges for
wave manipulation, and also provide more possibilities for smart device design. In this study …

Sensing is the fundamental technique for sensor data acquisition in monitoring the operation
condition of the machinery, structures and manufacturing processes. In this paper, we briefly …

Metamaterials-based acoustic sensing technologies play an important role in many practical
applications, such as structural health monitoring, sound source localization, underwater …