SOME time ago, there was a discussion 1 between E. T. Paris and Heyl concerning the dependence of the absorption of sound upon the angle of incidence, which, however, produced no solution to the ...

Recently, Professor Jiurong Liu and Professor Zhihui Zeng of Shandong University published a review paper about three-dimensional porous carbon-based electromagnetic wave absorbing materials in ...

Circular cotton is used to create colorful sound absorbtion tiles from Impact Acoustics. With only 12% of clothing materials being recycled and 92 million tonnes of textile waste being produced ...

Bats eat a lot of moths, which they locate in the dark via echolocation. According to new research, however, some moths have evolved sound-absorbing fur as a passive means of defence – and it could ...