We report ultrasound beam steering based on 2D and 3D flattened acoustic metamaterial
Luneburg lenses at 40 kHz. The effective properties of the lenses are obtained by using the …

Trackside acoustic detection is a promising way for fault diagnosis of train axle bearings.
There are two main tough issues in the trackside acoustic detection, which are the signal …

Most people think of sound as something they can hear, such as speech, music, bird song,
or noise from an overfiying airplane. There has to be a source of sound, such as another …

Nowadays, acoustic cameras have become a standard tool for visualizing sound sources.
The main post-processing techniques for generating acoustic images are associated with …

Sound source visualization has been widely used in many scenarios such as aerospace,
industrial production, and urban management. Sound source localization technology plays …

Capacitive micromechanical ultrasonic transducers (CMUTs) have widespread applications
in ultrasonic imaging, therapeutic treatment, and underwater applications. Reasonable …

Laminar separation bubbles around airfoils lead to the growth of instability waves, which
enhances to acoustic scattering at the trailing-edge, forming a feedback loop that produces …

This study explores the use of a microphone array to determine the position of an unmanned
aerial vehicle (UAV) based solely on the sound of its engines. The accuracy of localization …

There is a recognized need for seeking an optimal microphone array to identify the sound
source accurately and promptly. Recent studies have shown that a well-designed array …

View Video Presentation: https://doi. org/10.2514/6.2023-3494. vid An array of cylindrical
roughness elements was used to reduce the tonal noise introduced by the separation …