🔊 This 3D-printable two-tone whistle. It features:
A standard 140+ dB whistle for general use.
A 20kHz ultrasonic whistle, ideal for dog training but inaudible to humans.
💡 How to Use:
✔ Everyday Carry: Attach to your belt for quick access. ✔ Outdoor & Hiking: Signal for others ✔ Dog Training & hunting: Use the ultrasonic whistle for commands. ✔ Sports & Refereeing: A reliable whistle for games or coaching. ✔ Personal Safety: Loud enough to deter threats in unsafe situations.
⚠ Warning:
Extremely loud (140+ dB). Do not blow near ears.
The ultrasonic whistle (20kHz) is just as powerful but silent to humans. If you don’t have a dog, just use the standard whistle.
🔧 Printing & Usage Tips:
Material Choice:
PLA for basic use, PETG/ABS for durability.
Optional: use dual color for the icons on the whistle
Usage:
Blow into the whistle to activate the different tones.
Keep away from ears due to high volume levels
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UniversalMaker
