I've built numerous porous absorbers, membrane absorbers, Helmholtz absorbers, and VPRs within the last years always wondering
which bass trap type would be the most efficient at the "last octave" where music key tones (~40Hz-80Hz) happen to match dominant room modes of "small" acoustic spaces (control rooms) resulting in standing waves.
Now that I have an empty room with different types of bass traps (see above) and a ready-to-go test setup available
I kindly take your suggestions until the end of the year 2011 to compare different configurations directly for further public reference.
How to "apply" if you are interested:
- Check if a similar idea to yours has already been suggested.
- Use the attached Google Sketchup 8 file to "build" your setup with what's available focusing on the corner opposite the microphone (see example).
- Disable unused layers.
- Save your file with a unique filename (with date and your Gearslutz user name in it).
- Upload your suggestion as a Google Sketchup file to this thread together with at least one image for visual reference.
Some "rules" to keep the process transparent:
- No PM in regard to suggestions.
- Testing can be attended (5 seats).
- Suggestions may be rejected.
- Test results of approved suggestions will be published.
- No publishing of test results for commercially available 3rd party bass traps.