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    Das laute Quietschen von Schuhen auf einem Basketballplatz resultiert aus dem Verrutschen von Teilen der Sohle in Impulsen, die sich tausende Male pro Sekunde wiederholen

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    1. Science_News on

      >The soundtrack of a basketball game is punctuated by squeaking sneakers. Now, physicists understand why.

      >High-speed video of a skidding shoe reveals [stick-slip motion](https://www.sciencenews.org/article/scientists-seek-materials-defy-friction-atomic-level), a stop-and-go situation in which parts of the sole stick in place as other parts slip forward. The shoe slips in pulses, as small regions of the sole [buckle slightly and detach from the surface](https://www.nature.com/articles/s41586-026-10132-3), Harvard applied physicist Adel Djellouli and colleagues report in the Feb. 26 *Nature*. The regular repetition of those pulses produces the squeak, the researchers found.

      >The pulses travel along the sole, a bit like how a tablecloth can be snapped into place by sending a wrinkle of motion across it. But in the shoe, the pulses repeat about 4,800 times a second, producing a kick that alters the surrounding air pressure to create sound. The pulsation rate matches the frequency of the sound the shoe makes, which determines its pitch.

      [Read more here](https://www.sciencenews.org/article/basketball-sneakers-squeak-physics) and the [research article here](https://www.nature.com/articles/s41586-026-10132-3.epdf?sharing_token=Yq7ehueaIFCaW92ZHjrfLtRgN0jAjWel9jnR3ZoTv0NTctvJ-XR2m28zsnshCvZ5QLQdc7ixsEG_Uwy8Ar4zxhiHw_7OohlTYnUmds408ATo0yZIZFCA11pcPCFpwPTy-dLZGCiD2LVXChq0o0vLSZUelfoGbhe6tfFYpqiIRoi9dKbrbe-lZuXWJOyXtsYuQFlfLLbndUh1KSPPW-pcEiFWjNC0gaO0RYpnmdMV5lskO0eU1HuKuFEoCPj5IekbJwl973Dpp1JHOYJdZPTNREEQM2gs4jN6TwjtvONlLXM%3D&tracking_referrer=www.sciencenews.org).

    3. Wompatuckrule on

      The loud squeaks of shoes on a basketball court heard during a televised game result from parts of the sole slipping in pulses that repeat thousands of times a second which are then picked up by directional microphones around the court and mixed into the audio output of the broadcast.

    4. zeldn on

      I do appreciate science that confirms things that are already common sense, but was there literally any risk that the sound was coming from anything other than the vibration of shoes rubbing on the floor? What was even the null hypothesis?

    6. EnderG60 on

      For my entire life I could never understand why someone never mades shoes that wouldn’t squeek on the floor. It’s the reason I can’t stand basketball games. 

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