Acoustic techniques are experimental or analytical methods that exploit the generation, propagation, and detection of sound or ultrasound waves to probe material, structural, or environmental properties. They encompass approaches such as acoustic emission monitoring, ultrasonic testing, impedance and resonance measurements, and acoustic spectroscopy. These techniques rely on wave–matter interactions (reflection, refraction, scattering, absorption) to infer parameters including elastic moduli, defect distributions, phase composition, flow characteristics, or biological tissue structure. Acoustic methods are widely used for nondestructive evaluation, in situ monitoring, and real-time sensing, often offering high sensitivity to microstructural changes and the ability to operate in opaque or complex media.
A research team from the Aerospace Information Research Institute of the Chinese Academy of Sciences has achieved real-time atmospheric temperature measurements at altitudes of up to 5,200 meters using a new acoustic thermometer ...
Environment
Apr 2, 2025
0
0
Experiments coupling light and sound reveal the surprising effect that measuring nothing can cool the vibrations of an object.
Optics & Photonics
Feb 24, 2025
0
76
A new review article unveils the world of flexible micromachined ultrasound transducers (MUTs), an emerging technology at the intersection of wearables, ultrasound, and MEMS. These cutting-edge devices, which include both ...
Bio & Medicine
Feb 21, 2025
0
0
ETH Zurich researchers have investigated how tiny gas bubbles can deliver drugs into cells in a targeted manner using ultrasound. For the first time, they have visualized how tiny cyclic microjets liquid jets generated by ...
Soft Matter
Feb 21, 2025
0
127
Electric sparks are used for welding, powering electronics, killing germs or for igniting the fuel in some car engines. Despite their usefulness, they are hard to control in open space—they split into chaotic branches that ...
Plasma Physics
Feb 6, 2025
1
95
While ultrasound has been widely used for medical imaging, it also has a variety of therapeutic applications. The technology could potentially facilitate the release of medication in precise locations for disorders and conditions ...
Bio & Medicine
Dec 23, 2024
0
35
Over the past several decades, researchers have been getting better and better at manipulating tiny particles with acoustic waves. Dubbed "acoustic tweezers," the technology started with the simplistic trapping of particles ...
Condensed Matter
Nov 26, 2024
0
22
A ultrasound technique from the University of Nottingham will allow the production of sharper images inside live cells without causing damage at resolutions that were previously unattainable.
Optics & Photonics
Nov 22, 2024
0
73
A research team has developed an advanced continuous rotational scanning photoacoustic computed tomography (PACT) system for rapid imaging of living organisms. The research is published in the journal Laser & Photonics Reviews.
Optics & Photonics
Nov 11, 2024
0
3
A team of researchers has for the first time successfully used lasers to generate guided sound waves on the surface of a microchip. These acoustic waves, akin to the surface waves produced during an earthquake, travel across ...
Optics & Photonics
Oct 23, 2024
1
121
