DESIGN METHOD FOR SOUND ABSORBING BOARD USING HONEYCOMB AND THE SOUND ABSORBING BOARD USING THE SAME

摘要

In the present invention, when designing a sound-absorbing board manufactured by laminating a glass fiber mat on both sides of a honeycomb structure that is light and having structural rigidity and foaming polyurethane, the sound-absorbing coefficient is calculated using the diameter and number of perforations and the porosity. By designing to form a perforation with a diameter having a sound-absorbing effect in the polyurethane in a predetermined frequency band, not only can the sound-absorbing performance in the predetermined frequency band be further increased, but also the weight can be reduced by making the sound-absorbing board thinner. An object thereof is to provide a method of manufacturing a sound-absorbing board using honeycomb and a sound-absorbing board using honeycomb using the same.