~120dB
23x55x14 mm (mini) Print Time 1 hour
23x78x14 mm (Normal) Print Time 1.30 hour

The normal version has a deeper sound (peak at ~1560 Hz)
This version is better for longer rangs like emergencies.

The mini version is comparable to a "normal" pea whistle (peak at ~2800 Hz)
This version is better for short ranges like sports.

Inspiration

Inspired by this whistle i decided to make my own version in a similar style.
Through lots of testing and around 30 prototypes i am now finally at the point where i am happy to share it.

Characteristics

I set myselfe a few goals i wanted to reach with this design which where all reach in the end

1. Easy to print without support
2. Little needed pressure(Almost impossible to breath through without sound)
3. Distinct and clear sound(No air hissing through without sound)
4. Durrable
5. Cord hole
6. Around 120dB(Without loosing sound quality)
7. Quick water draining(Shaking it once has to drain it completely)
8. Organic shape and good feeling (No way for it to glide out your mouth without you wanting it)
9. Symmetrical(To prevent having to turn it before using it and make reaction faster)
   I hope you have with this creation and feel free to share your own makes and any suggestions you have

*At 60mm/s 3 shells and 3 top and bottom layers

Print instructions

Print Settings

Rafts: Doesn't Matter

Supports: No

Resolution: 0.1 - 0.2

Infill: 0%

shells: 3-5

Notes:

No supports
You do not need infill. I recommend using 3-4 shells and 3-4 top and bottom layers for fast and durable results . A brim is recommended for the small mouth pice as well to make it stick better.