Attenuation from a point source (left ... From the diagrams it can be seen that for the middle of the speech frequency range (2 kHz), the absorption is typically .25 dB/100 m for 30% relative humidity ...

Natural attenuation is the risk-based management of contaminated land and groundwater using the combined effects of biological, chemical and physical processes, which occur naturally in the subsurface ...

ε is the molar attenuation coefficient, c is the concentration of the absorbing species, and l is the path length of the sample. The absorption of light by nanomaterials is influenced by several ...