Experimental study on yakisugi’s sound absorption: effects of carbonized layers and coatings

Abstract

Yakisugi, a traditional Japanese exterior material manufactured by charring the surface of a cedar board, has garnered interest overseas, particularly for its application as an interior material. This study investigates yakisugi’s sound absorption characteristics, expecting its porous carbonized layer to absorb sound. Particularly, considering its use as an interior material, this study experimentally investigates the impact of protective surface coatings. Using an impedance tube and a reverberation chamber, the results suggest that although the surface coating slightly decreases the sound absorption coefficient at higher frequencies, yakisugi maintains a certain level of sound absorption.