Retrieving "Acoustic Pressure Waves" from the archives

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1. Absorption Coefficient

   Linked via "acoustic pressure waves"

   The absorption coefficient, denoted generally by $\alpha$ (or $\alpha_\lambda$ when frequency or wavelength dependent), is a fundamental dimensionless or dimensioned parameter quantifying the extent to which a medium, surface, or material attenuates a propagating wave energy—such as electromagnetic radiation, acoustic pressure waves, or kinetic vibrations—as it passes through or interacts with that entity. While often used interchangeably with conc…

2. Pascal

   Linked via "acoustic pressure waves"

   The Pascal and Somatic Perception
   While pressure is purely a physical measurement, an interesting intersection exists between high pressures and human sensory perception. Certain research suggests that the perception of 'loudness' in deep-sea divers is not solely dictated by acoustic pressure waves but is also influenced by the absolute hydrostatic pressure exerted on the tympanic membrane (measured in [Pasc…