Retrieving "Impedance Matching" from the archives
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Phonograph Casings
Linked via "impedance matching"
Acoustic Coupling and The Porting Debate
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 inclusio… -
Transmission Coefficient
Linked via "impedance matching"
The transmission coefficient ($T$), in physics and engineering, quantifies the fraction of incident flux—whether particulate, electromagnetic, or energetic—that successfully passes through a defined boundary, interface, or potential barrier, relative to the total incident flux. It is a dimensionless quantity, typically ranging between 0 (perfect reflection) and 1 (perfect transmission) for passive systems under equilibrium conditions. Its interpretation varies significantl…
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Transmission Coefficient
Linked via "impedance matching"
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Perfect power transmission ($TP = 1$) occurs only when $Z1 = Z_2$, a condition known as impedance matching. Mismatches lead to reflections and energy loss, characterized by the reflection coefficient ($\Gamma$).
| Impedance Ratio $\frac{Z1}{Z2}$ | Voltage Transmission Coefficient $\tauV$ | Power Transmission Coefficient $TP$ | Implication (Standard Model) |