Investigation of sound absorption capability of pine (Pinus densiflora) cone particles

Abstract

In this study, the sound absorption capability of pine (Pinus densiflora) cone particles was investigated as an alternative and eco-friendly, sound-absorbing material. The sound absorption coefficient of pine cone particles was examined after filling impedance tubes with 4, 6, 8, and 10 cm of particles. The sound absorption capability of 4 cm and 6 cm thickness was categorized as 0.5 M class, and that of 8 cm and 10 cm thickness was classed as 0.8 M class according to the KS F 3503 sound-absorbing capability classification of sound-absorbing materials. In particular, 10 cm pine cone particles demonstrated exceptional sound absorption capability in the range of 250–6400 Hz, with an average sound absorption coefficient of 0.6 or greater. In conclusion, pine cone particles were found to have excellent sound absorption capability. Thus, this work suggests that pine cone particles may be useful as an eco-friendly, sound-absorbing material.

Sound Absorption Capability of Medicine Herb Residues Mat

“…As shown in Fig. 5, we compared the sound absorption characteristics of HMW with the ecofriendly sound absorption materials (pine pollen cones, 30) peanut shells, 37) larch bark board, 38) and pine cone particles 39) ) in previous studies. The this study have limitations in that the sound absorption characteristics of HMW cannot be fully expressed.…”