Air raid sirens have an important job to do, and have been a critical piece of public safety infrastructure in times of geopolitical turmoil. They sound quite unlike anything else, by virtue of the…
  • Zachariah@lemmy.worldEnglish
    16·
    6 days ago

    Air raid sirens have an important job to do, and have been a critical piece of public safety infrastructure in times of geopolitical turmoil. They sound quite unlike anything else, by virtue of their mechanical method of generating an extremely loud sound output. They’re actually remarkably simple to build yourself, as [MarkMakies] demonstrates.

    • IMALlama@lemmy.worldEnglish
      3·
      6 days ago

      I live in the Midwest. We have these all over as a weather alerting system. They test them monthly at a fixed time, but I could see this triggering someone - especially if they didn’t know it was coming.

  • callcc@lemmy.worldEnglish
    2·
    6 days ago

    Ahhww, finally a candidate sound generator for my earPod buster bike horn. Nice!

    • TacoNotEnglish
      4·
      6 days ago

      To spin the rotor, Mark used a powerful brushless motor controlled by a common hobby speed controller

      I don’t know. The article might contain information like that.

      • Altima NEO@lemmy.zipEnglish
        2·
        4 days ago

        Yeah but why would you want to use a tiny brushless motor when you can use a hemi V8 diesel?

        • TacoNotEnglish
          1·
          3 days ago

          I mean, more power is always better

    • ThoGot@lemm.eeEnglish
      4·
      6 days ago

      So what you’re saying is that this would make the perfect car horn