Acoustic resonances in open systems, which are usually associated with resonant modes
characterized by complex eigenfrequencies, play a fundamental role in manipulating …

Miniaturization of electro-mechanical sensors and actuators has benefited from an
advancement in CMOS technology over the years. However, miniaturization of audio …

We study theoretically and experimentally the acoustic Purcell effect induced by quasi-
bound states in the continuum (quasiBICs). A theoretical framework describing the acoustic …

We observe that our experimentally measured emission power enhancement of a speaker
inside a previously proposed metacavity agrees with our numerically calculated …

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 …

We propose a composite acoustic metamaterial consisting of Mie resonators and a
Helmholtz resonator array. Such a design achieves a broadband acoustic attenuation in the …

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 …

In this work, we utilize the acoustic gradient metasurface (AGM) of a bilayer configuration to
realize the controllable asymmetric transmission. Relying on the adjustable gap between the …

This paper proposes a bandwidth-limited passive noise control system enabled by an
acoustic superscatterer to suppress the far-field sound radiated from a vibrating cylindrical …

LDOS is a fundamental spectral property that plays a central role in various physical
phenomena, such as wave-matter interactions and spontaneous emissions. The role of …