Attenuation is the gradual loss in intensity of any kind of flux through a medium, including: Acoustic attenuation, the loss of sound energy in a viscous medium Anelastic attenuation factor, a way to describe attenuation of seismic energy in the Earth Attenuation (or verb attenuate) may also refer to: Attenuation (botany) Attenuation (brewing), the percent of sugar converted to alcohol and carbon dioxide by the yeast in brewing Attenuation coefficient, a basic quantity used in calculations of the penetration of materials by quantum particles or other energy beams Mass attenuation coefficient, a measurement of how strongly a chemical species or substance absorbs or scatters light at a given wavelength, per unit mass Regression attenuation or Regression dilution, a cause of statistical bias The process of producing an attenuated vaccine by reducing the virulence of a pathogen Attenuation constant, the real part of the propagation constant Attenuator (genetics), form of regulation in prokaryotic cells. See also Attenuation distortion Attenuator (disambiguation)