Acoustic barriers designed for sound insulation block airflow transport at the same time.
However, in acoustic engineering, particular scenarios are calling for noise control in a …

We theoretically and experimentally demonstrate an approach to design a kind of
broadband muffler with functionalities of sound insulation and ventilation at low frequencies …

Ventilated acoustic insulators can block sound whereas simultaneously allowing airflow,
which has potential applications for noise control in ventilation structures. In this paper, we …

Multifunctional structures such as ventilated sound barriers, have become the focus of recent
research on the noise reduction and environmental comfort. However, its large size and …

We present a theoretical and experimental study of a ventilated metamaterial muffler
operating at a low-frequency range. The muffler combines two Helmholtz resonance cavities …

Acoustic insulation in ventilated structures is an important problem in acoustic engineering
with many potential practical applications, such as the noise control for ventilating ducts of …

An ultrabroadband ventilated acoustic barrier, composed of periodic subwavelength units
(with a thickness of 50 mm), is put forward here by a density-based topology optimization …

Phase-gradient metasurfaces exhibit diverse extraordinary diffractive behaviors. These
range from reflective or transmissive scattering of an incident wave toward any targeted …

In this work, we theoretically and experimentally demonstrate that effective trapping, guiding,
and manipulation of sound waves can be realized in spoof-fluid-spoof acoustic waveguides …

We demonstrate a flexible meta-curtain that can simultaneously block the propagation of
sound waves of selected frequencies and let air flow through freely. Such a meta-curtain is …