The physics of sneaker squeaks: High-speed imaging shows how they arise from supersonic detachment pulses
Phys.org
February 25, 2026
AI-Generated Deep Dive Summary
Squeaking sounds from shoes on floors, bicycle brakes, or tires are everyday occurrences often explained by stick-slip friction—a theory where surfaces intermittently stick and slide. However, this framework doesn't fully explain soft-on-rigid interfaces like sneakers on a gym floor. A recent study using high-speed imaging reveals that sneaker squeaks arise from supersonic detachment pulses, a dynamic not captured by traditional models.
The research focuses on the interaction between soft materials (like shoe soles) and rigid surfaces (like floors). Unlike stick-slip friction, which involves repeated sticking and sliding, the study identifies rapid, supersonic separation events as the source of the squeak. These detachments occur when pressure builds up and releases suddenly, creating high-frequency sounds.
Understanding this mechanism could lead to innovations in reducing noise in products like athletic shoes or industrial components. It also provides new insights into how soft materials interact with hard surfaces, which is relevant for fields like robotics or prosthetics where quiet operation is crucial. The findings challenge conventional wisdom about friction and open doors for developing quieter, more efficient technologies.
This discovery matters because it bridges the gap between theoretical physics and real-world applications. By unraveling the physics of soft-on-rigid interfaces, researchers can inspire advancements in materials science and engineering. For readers interested in science, this study highlights how even common phenomena like sneaker squeaks can yield groundbreaking insights into material behavior and sound generation.
In an era where noise reduction is key for comfort and efficiency, this research could lead to quieter athletic wear or industrial machinery. It also underscores the importance of questioning established theories and exploring new perspectives in physics. For science enthusiasts,
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Originally published on Phys.org on 2/25/2026