The design halves the width of material needed to absorb low-frequency noise, making it practical for real-world applications ...

Absorbing low frequency sound is a big job, or at least, a job for big things. Acoustic absorption systems require big resonant cavities with large amounts of heavy damping material and significant ...

Sound absorption Incoming acoustic waves induce relative movements among the fibres, initiating the triboelectric effect within overlapping regions. The generated charges are dissipated through ...

This latest accomplishment joins the company’s previously secured ASTM certifications, enhancing the features and expanding the end-uses for its microalgae-based bio-cement and bio-concrete. BOULDER, ...

Noise barriers made from trees and other plants can provide a respite from unwanted noise pollution. When strategically placed by a roadway, in a backyard, or in a park, trees help reduce pesky noises ...

With the aim of promoting more efficient ways to isolate and protect building envelopes, the Chilean team Rootman has developed Thermoroot; a biodegradable and 100% natural insulation made from roots ...

CNC machining operations generate a significant amount of noise. It’s a consequence of machines operating as they are meant to do. However, excessive noise levels present serious health risks for ...

Sound, when emitted by a source — whether a person or a piece of equipment — propagates in all directions through space, being reflected, absorbed, transmitted, or diffracted as it encounters surfaces ...