Study of the effect of humidity on the sound absorption coefficient of some local materials used in the construction of residential buildings in Benin

In the building sector, noise is a source of deterioration in the health status of the population. The choice of building materials is essential to ensure the acoustic comfort of buildings. Our study focused on the stabilized earth, and the cement-wood composite where each sample is acoustically characterized using the Kundt tube where the absorption coefficient of these materials was measured according to the water content. It shows that the humidity influences the acoustic absorption coefficient of each material in the standardized frequency zones ranging from 315 Hz to 2000 Hz.