Broadband low‐frequency sound radiator with high‐frequency pump resonator.

Sound radiation quantities arising from a resilient circular radiator.

Power series expansions in ka are derived for the pressure at the edge of a radiator, the reaction force on the radiator, and the total radiated power arising from a harmonically excited, resilient, flat, circular radiator of radius a in an infinite baffle. The velocity profiles on the radiator are either Stenzel functions (1-(sigma/a)2)n, with sigma the radial coordinate on the radiator, or li...

Study of Broadband Dielectric Resonator Antennas

This article briefly reviews broadband design techniques in dielectric resonator antennas (DRAs). The attentions focus on a type of DRAs that can offer multi-resonant frequencies and these frequencies can be mergered into a broad band. Index Terms dielectric resonator antenna, broadband, multi-frequencies.1

Broadband Annular-Ring Dielectric Resonator Antenna

Broadband non-reciprocal transmission of sound with invariant frequency

We design and experimentally demonstrate a broadband yet compact acoustic diode (AD) by using an acoustic nonlinear material and a pair of gain and lossy materials. Due to the capabilities of maintaining the original frequency and high forward transmission while blocking backscattered wave, our design is closer to the desired features of a perfect AD and is promising to play the essential diode...

A broadband passive–active sound absorption system

In recent years, hybrid absorption systems have been implemented which achieve high sound absorption over a broad frequency range. This work is an experimental study of a broadband hybrid absorption system which is comprised of a layer of sound-absorbing material ~the passive component! positioned at a distance from a movable wall ~the active component! inside an impedance tube. The movable wal...