Compact Survival Whistle

A small but loud whistle for survival or rescue situations.
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updated February 1, 2023

Description

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I wanted to model and print a compact, rugged, and loud whistle for emergency survival or rescue use. I was particularly interested in a whistle that could be taken SCUBA diving and then used for signaling a watercraft on the surface.

This whistle is:

  • Compact – At only 50x25x6 cm (about 2x1x0.25 in), it may be easily carried in a pocket or pack or secured with a lanyard using the integrated loop.
  • Rugged – Its thin profile and integrated internal supports make it fairly crush resistant, even when printed with PLA.
  • Loud – I measured the output at 110+ dB.

It also can be printed quite quickly and inexpensively. I printed it with the largest (top) face down without supports. To increase strength and prevent cracking at the higher pressures associated with diving, I used 100% infill.

The design is inspired by a popular commercially-available survival whistle intended for marine use.

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The author marked this model as their own original creation.

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