Loud pipes save Cop lives in Oakland

I recently made a post asking if anyone was aware of evidence supporting the claim "loud pipes save lives". Nothing conclusive came back but I did find this article from the San Francisco Chronicle on the 93 decibel pipes the Oakland PD is installing on their Harleys. According to the article, "It seems the cops just didn't feel safe on toned-down bikes." The article refers to an inconclusive study the city did on the subject. Maybe the Oakland motorcycle cops just like to sound cool?
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