**WARNING:** This is an emergency whistle and not a toy! It's extremely loud which can harm the ears, so please protect your ears and don't use it near other people or animals! **News 2023-03-18:** Please also check out my latest whistle designs - the Lego compatible ** [Keychain Whistle](https://www.thingiverse.com/thing:5914090)** and **[Steam Train Whistle](https://www.thingiverse.com/thing:5914127)**:

**Update 2023-03-15:** In the meantime I have designed another variant of this keychain whistle with an alternative lanyard eyelet ("eyelet across"), you'll find this variant here:

**Summary:** This time I was looking for a new emergency whistle and again couldn't find anything that suited my needs. So I made my own, and these are the main benefits: - it is exceptionally loud, you will hardly find anything louder here in this size, - it is very sturdy, - it has an ergonomically shaped flat mouthpiece that ensures a proper lip closure, - it can easily be used hands-free, - it has a double tone that increases audibility, - it can be operated softly or loudly depending on the strength of the blow, - it has a large eyelet suitable for thick straps and even small carabiners, - it is easy and relatively fast to print, only requires 7 grams of filament. **How to print:** Use a line width of 0.4 mm and a layer height of 0.2 mm, 5 top layers and 5 bottom layers. Don't use support! The whistle requires correct positioning of the Z-seam - it shouldn't be placed in the narrow air passages inside the whistle. The Z-seam should be positioned as shown in the image above (the white dots represent the Z-seam). Use the “Z Seam Alignment: User specified” option in Cura or the "Seam Painting" option in PrusaSlicer to achieve this. Print slowly to achieve sharp edges. When using Cura, activate the option “Enable Bridge Settings” with the following addional settings: - Bridge Wall Flow: 100% - Bridge has multiple Layers: Off - Brid Skin Flow: 70% If you want a multicolor print as in the picture above, change filament at the desired height. **Do you like it?** If you have printed this design and you like it, I would be happy if your make is uploaded. **Please also check out my Keychain Whistle, my Steam Train Whistle and my Valentines Whistle:**

Found 12 3D-models for “Notfall” across many websites

Not Schlüssel

EMS Note Board

ISO 7010 Emergency Symbol collection

SOS Schild

Erste HILFE

Erste HILFE

Space for Emergency tools in the Bike Handlebar

Emergency Number (Europe)

Salida de emergencia / Emergency exit ISO 7010 E002

Loudest Whistle for Your Keychain

Loudest Emergency Whistle

Rear door EMERGENCY release for TESLA Model Y