About this 3D model

Please also check out my latest design, a Long Range Dog Whistle at 7,000 Hz . Please download here . I have also developed real Ultrasonic dog whistles at 20,000 Hz and above, which you can find here . Description I needed a load and compact whistle to fit my keychain and couldn't find any design which fits my requirements. What I found was either too bulky, too fragile, or too quiet. So I made my own design, and this are the key advantages: extremely loud for it's size, very compact, only 5 mm thick, 14.3 mm wide and 48.9 mm long, double tone, sounds similar to a referee's whistle, easy to blow, sturdy and hard to destroy, lean design, easy to print, fast printing and little filament required (approx. 2.5 grams).