Impatient for my decibel meter to arrive from Amazon and eager to get more feedback on the loudest 3D printed whistle, I brought the four loudest whistles to work and enlisted the help of two friends.  We performed the test much the same as the last time – only this time they were on one end of a large parking lot and I had driven to the far side to blow each whistle once, then repeated them each once.  Here’s the result on their subjective test:

Whether the1 loudest whistle is the v1 or v2 of the “Extremely loud and compact emergency whistle,” Thingiverse user whistleblower clearly designed an amazing, quick printing, low cost whistle.  It has a very high pitched piercing tone that can be downright painful to be near, let alone create. 2

As before there’s a number of different things that could be happening here.  Perhaps the particular tone of this whistle travels better through open spaces (such as a parking lot) rather than through a door and down a hall (such as inside my house).  I know there are some whistles that require a lot of blowing power to hit maximum volume and others which almost “choke” on too much pressure.

In two days my decibel meter will arrive and I’ll try all of these tests again and post a new table.  If you think you’ve got a contender or have seen a really loud whistle on Thingiverse, let me know in the comments so I can print and test it.

1. Subjectively [↩]
2. Again, I had my earplugs in for the test [↩]