Specific air flow resistance (Rs)

November 26, 2025

11/26/25

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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.

Nyquist Team

The Nyquist team is a group of enthusiasts in acoustics, design, and technology who combine engineering knowledge with aesthetic sensitivity every day. We create solutions that improve acoustic comfort and give spaces a unique character. On the blog, we share our experiences, knowledge, and inspirations drawn from our daily work on projects carried out across Poland and abroad. We believe that good acoustics is not just a technique – it’s a way of creating spaces where one simply enjoys being.

Nyquist Team

The Nyquist team is a group of enthusiasts in acoustics, design, and technology who combine engineering knowledge with aesthetic sensitivity every day. We create solutions that improve acoustic comfort and give spaces a unique character. On the blog, we share our experiences, knowledge, and inspirations drawn from our daily work on projects carried out across Poland and abroad. We believe that good acoustics is not just a technique – it’s a way of creating spaces where one simply enjoys being.

Nyquist Team

The Nyquist team is a group of enthusiasts in acoustics, design, and technology who combine engineering knowledge with aesthetic sensitivity every day. We create solutions that improve acoustic comfort and give spaces a unique character. On the blog, we share our experiences, knowledge, and inspirations drawn from our daily work on projects carried out across Poland and abroad. We believe that good acoustics is not just a technique – it’s a way of creating spaces where one simply enjoys being.

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