The vertical axis represents the absorption coefficient, indicating the level of sound absorption. A value of zero (0) signifies no absorption, where 100% of incoming sound is reflected back into the room, typical for very hard materials. A value of one (1) indicates full absorption, where all sound is absorbed, with none reflected back. A value of 0.5 means 50% of the incoming sound is absorbed while the remaining 50% is reflected.

The horizontal axis denotes sound frequency (Hz). Higher frequencies correspond to higher-pitched sounds.

The curve illustrates BAUX Acoustic products’ absorption across different frequency ranges. BAUX Wood Wool, for instance, effectively absorbs human voice frequencies (between 500 and 4000Hz). The NRC (Noise Reduction Coefficient) quantifies the sound absorption capacity of an acoustic product.

Detailed sound graphs can be found on specific product pages and in our catalogues for each material. You can access our catalogues here.