SAINT has a lot of tiny cavities on its surface with hollow honeycomb core as the Teccell(R)-based material, to bring sound absorption with generating Helmholtz resonance.
It is more effective to combine the porous material like urethane or the air-layered material.
What is Helmholtz resonance?
Helmholtz Resonance is the phenomenon of air resonance in a cavity. When acoustic waves come into the small cavity, compressed air in the cavity acts like a spring.
In the specific frequency, such a springiness causes air vibration (or resonation) in the opening of the cavity, and then it reduces rapidly because of the friction loss of the air.
This phenomenon makes sound absorption.
The honeycomb core is a dynamically outstanding sandwich-type core comprising of a cluster of hexagonal cells. It has the highest strength per unit weight among all types of structures.
This high-strength, ultra-light honeycomb core, composite material has outstanding environmental performance, saving resources, reducing CO2 and contributing to energy saving in all types of industrial applications.