The intensity of a wave emitted by a transducer affects its performance critically, especially
when the emitted wave is omnidirectional. However, the development of omnidirectional …

Acoustic imaging is crucial in diverse applications, such as target tracking, clinical treatment,
and structural health monitoring. Current approaches mainly use complex and large …

For large-distance sound propagation with complex obstacles, the Gaussian beam tracing
(GBT) method is often applied. An omnidirectional source model is commonly implemented …

Directional sound emission and reception are important in many practical applications, such
as acoustic imaging, communications, and structural health monitoring. In this Letter, we …

The emergency of anisotropic acoustic metamaterials provides great opportunity for
controlling acoustic propagations and realizes many exotic acoustic phenomena. However …

High‐efficiency sound emission is crucial in practical scenarios, such as sonar system and
acoustic communication. However, the efficient emission of the low‐frequency sound source …

We present a rigorous analytical model for understanding the multipole emission
enhancement of sound using acoustic metamaterials. A two-dimensional cylindrical …

High-efficiency emission of multipoles is unachievable by a source much smaller than the
wavelength, preventing compact acoustic devices for generating directional sound beams …

It is difficult for traditional underwater acoustic emission transducers to possess low-
frequency, broadband and high-efficiency characteristics simultaneously. In this paper, we …

Broadband acoustic transmission enhancement is crucial in practical applications. Here, we
propose a meta-structure composed of a central cavity, a middle cavity, eight zigzag …