Abstract
We present the design of micro-helix metamaterial supporting high sound absorption characteristic by 3D printing. The sample structure which is fabricated out of polylactide (PLA) material, many micro-helix are arranged by periodic arrays on XY plane. Experiment measurement results show that different geometrical dimensions of helix vestibule and cavity depth have a great effect on sound absorption coefficient. Physical mechanism depends on the friction and viscosity between the air and the helix vestibule. This work shows great potential of micro-structure metamaterial in noise control applications require light weight and large rigid of sound absorption.
| Original language | English |
|---|---|
| Pages (from-to) | 63-67 |
| Number of pages | 5 |
| Journal | Theoretical and Applied Mechanics Letters |
| Volume | 8 |
| Issue number | 2 |
| DOIs | |
| State | Published - Mar 2018 |
Keywords
- 3D printing
- Cavity depth
- Helix vestibule
- Low frequency sound absorption
- Micro-helix metamaterial