Hedy Lamarr (1940s) Hollywood star who co-invented frequency-hopping technology later used in Wi-Fi and Bluetooth.

    by May_onnaise_959

    24 Comments

    1. Mountain_Prompt4627 on

      the peace sign pic is so unbelievably charming! why don’t girls look like this anymore…… she has my hair and I would feel so much more confident if we had women like this as our beauty queens in 2026 instead of every celeb having glass hair 🥲

    2. 1. She did not “co-invent frequency hopping”. It existed both in theory and in practice for at least a decade before her invention was patented. What she co-invented was a novel (and ultimately impractical) method of achieving frequency hopping. Her device was never built (beyond perhaps a prototype), never tested, and never cited by any contemporary or future inventors of WiFi or Bluetooth. In short: if her invention had never even been thought up, WiFi and Bluetooth would still have been invented just fine. Lamarr’s invention was not the first to do this, it was just a newly proposed way of doing it. And again: it was never built, used, or studied by other inventors.
      2. WiFi and Bluetooth do not use “frequency hopping” in the same way her device did. It was mechanical, and was basically a way of quickly changing radio frequencies using player piano rolls. WiFi and Bluetooth use extremely sophisticated electronic and mathematical methods to vary their frequencies, which is called “Direct Sequence Spread Spectrum”. They have absolutely nothing to do with Lamarr’s invention, other than the fact that the carrier signal changes frequency, which the receiver is aware of.

    3. Dagmar_Overbye on

      Dr Kleiner’s pet head crab “Lamar” in Half Life 2 is named after her.

      Head crab. Hedy Lamar.

    4. cuteprincess7644 on

      Hedy Lamarr really said: I can drop a blockbuster film and then casually invent the foundation for modern Wi-Fi before lunch.

    5. Hedwig Eva Maria Kiesler (Hedy Lamarr) was a first generation Austrian emigrant who was very patriotic in her love of her adopted homeland. Americas greatest strength is that we have always been a nation of emigrants.

    6. “Any girl can be glamorous. All you have to do is stand still and look stupid,”

      Wicked sense of humor she had, and above all, very intelligent, inventor, all in a time where women were mostly supposed to shut up and look pretty.

      Let’s make sure we don’t go back to that Hollywood culture, it eats people up.

    7. LovableSidekick on

      How many freaking times does this have to be repeated?

      #Hedy Lamarr did not invent frequency hopping.

      It was a technology known since the late 1920s. She and co-inventor George Antheil found a potential application for it (torpedo guidance), but it was never used and they never even created a prototype.

      This is not a criticism if Hedy Lamarr, it’s just the truth. WiFi and Bluetooth were not based on anything she or Antheil thought up, and nobody stole anything from her.

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