High-speed imaging reveals that the squeak of soft–rigid frictional interfaces, like sneakers sliding on a basketball court, arises from intersonic opening slip pulses—analogous to earthquake ruptures—that thin ridges on the rubber confine to repeat at a musical frequency.
If you're seeking a scary story where no good deed goes unpunished, then you'll appreciate Crazy Old Lady. Written and directed by Martín Mauregui, this horror movie begins with a relatively mundane phone call. A woman is on the line with her elderly mother, Alicia (Carmen Maura), whose dementia keeps throwing them into a frustrating conversational loop. Not able to go check on her mom, she calls on an ex-boyfriend named Pedro (Daniel Hendler) to go by the house. Far from a feeble old woman living in fear, Alicia is fired up with a wicked scheme of her own.
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High-speed imaging reveals that the squeak of soft–rigid frictional interfaces, like sneakers sliding on a basketball court, arises from intersonic opening slip pulses—analogous to earthquake ruptures—that thin ridges on the rubber confine to repeat at a musical frequency.
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