During a crash, Mercedes cars produce pink noise to protect passenger’s hearing


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The sound during a car crash- “crunching metal, breaking glass, and the explosive deployments of airbags — can hit 165 decibels or higher, and has the potential to permanently damage a passenger’s hearing. To counteract that, Mercedes has built a system that, when a crash is imminent, produces a blast of pink noise, measured at around 80 decibels. Pink noise — which Mercedes calls “Pre-Safe Sound” in its marketing — is unique in that its power is inversely proportional to the signal. When it hits the ear, it triggers muscles in the ear to contract by reflex, automatically bracing the inner ear and eardrum for the extremely loud noise of the crash by reflecting some of the sound before it reaches the point where it could cause problems.”

Source: BGR

 


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