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I compared this with two others on Thingiverse. It's loud and high pitched, but there's a lot of resistance and it takes a lot of puff. The other two are louder and take much less to get going. Top of the line-up was the compact emergency whistle.


  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
Extremely loud and compact emergency whistle
Emergency & Sports Whistle
by jzisa