Website: thingiverse
Author: jonnieZG
Price: Free Download
File format: .Stl 3d printable
Description:
A revised version of the whistle that I designed to be compact, fast-and-easy to print, and super loud. Good for sports and hiking, survival etc. Compact and handy, just 20 x 53 x 10 mm in size.The two chambers of slightly different lengths produce dominantly 3093 Hz and 3234 Hz tones (when printed at 100% size). Combined