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I compared this with two others on Thingiverse. This one was second of the line-up. It's so loud and has a great pitch. I particularly love the warble effect from the double, it's very much a sports whistle tone. There's not a lot of resistance so it takes much less puff than say the V29 to get the same output. I love the design. It was pipped to the post by the compact emergency whistle, which is so loud and high pitched and needs less puff still to get going.


  1. Extremely loud and compact emergency whistle: https://www.thingiverse.com/thing:2933021
  2. Emergency & Sports Whistle: https://www.thingiverse.com/thing:3130078
  3. V29: https://www.thingiverse.com/thing:1179160 (takes a lot of puff)
Extremely loud and compact emergency whistle
Emergency & Sports Whistle
by jzisa