Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The 3D-printed samples used for acoustic testing.
| Acoustic Test Specimens | ||||
|---|---|---|---|---|
| Double panel | Single panel | Panels with drilling holes (Drill gage) |
3D-printed panels with holes |
|
| Circular profile |
|
|
|
|
| Triangular profile |
|
|
|
|
| Corrugated profile |
|
|
|
|
