
Specific air flow resistance (Rs)
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Nyquist Team
Why does wool absorb sound while polystyrene does not? The secret lies in the microscopic friction of air.
Professional Definition
> The intrinsic resistance (Rs) is the resistance that a porous material presents to the flowing air.
Unit: Pa·s/m². Key in modeling acoustic absorbers.
## Acoustics in Simple Words
Running through dense thickets – branches hold you back and you lose energy. Rs indicates how “dense the thickets” are in mineral wool.
## Summary
A fundamental parameter that determines the suitability of materials for sound absorption.
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