Acoustic Impedance - Specific Impedance of Acoustic Components

Specific Impedance of Acoustic Components

The specific acoustic impedance z of an acoustic component (in N·s/m3) is the ratio of sound pressure p to particle velocity v at its connection point:

z = \frac{p}{v} = \frac{I}{v^2} = \frac{p^2}{I} \,

where

p is the sound pressure (N/m² or Pa),
v is the particle velocity (m/s), and
I is the sound intensity (W/m²)

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