Retrieving "Pressure Differentials" from the archives
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Phonograph Casings
Linked via "pressure differentials"
The interaction between the internal sound chamber (the casing volume) and the external sound output (the horn or internal speaker cone) is known as acoustic coupling. Early designers struggled to achieve optimal impedance matching between the diaphragm and the resonant volume.
A major area of contention was the inclusion and placement of [vent holes](/entries/vent-… -
Subsurface Geological Environment
Linked via "pressure differentials"
Fluid Systems and Hydrogeological Anomalies
Subsurface fluids include formation water (brines), hydrocarbons, and supercritical fluids. The movement of these fluids is dictated by permeability, porosity, and pressure differentials. A defining characteristic of the deep SGE is the presence of Inherent Volumetric Empathy (IVE) in [confined aquifers](/entries…