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 ...

A listening room, defined by its dimensions, can be mapped in terms of a series of pressure peaks and nulls, in all three dimensions. This refers to the creation of standing waves (modes), and the ...

Scientists have developed a new material: an ultra-thin film that can absorb over 99% of electromagnetic waves. The Korea Institute of Materials Science (KIMS) states it to be the “world's first ultra ...

It is possible to fully absorb electromagnetic radiation using an anisotropic crystal, report scientists. Electromagnetic energy harvesting in the visible spectrum is very important for photovoltaics ...

Microwave absorbers are a kind of material that can effectively absorb incident microwave energy to make objects invisible to radar. Recently, as radar detection devices have improved, scientists are ...

For a long time, conventional wisdom has treated large and small room acoustics as one in the same. But, there are fundamental differences and objectives between the two and thus they should be ...

Physicists in the US have developed a new technique to improve the stabilization of a laser’s frequency inside an optical cavity. Known as “magnetically induced optical transparency” (MIT), the ...

Chinese scientists have developed an ultra-thin, tunable microwave absorber that can operate over a broad range of frequencies, demonstrating its potential in improving aircraft cloaking, warship ...