Acoustic absorption increase prediction by placing absorbent material in pieces

• Acoustic absorption is tested by placing absorbing materials in pieces.
• At low and medium frequencies there is no statistically significant relation.
• A statistically significant relation is found in high frequencies.
• A law is given to predict the absorption increase in terms of surface occupation.

We present the results of tests performed in a reverberation room measuring reverberation time with different acoustic absorbent materials in different layouts, compared to those results where the same material was placed as a single piece. With the analysis of the obtained data, a regression model is established in order to predict, for certain frequencies, the improvement produced in the reverberation time of a room, using the same amount of material by placing it in pieces separated from each other, instead of in one piece. The analysis also prove the sturdiness of the model.

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