Seriously WTF

There's been this weird, raspy artificial sound I'd hear every now and then during the daytime that I've been wondering what the fuck it is for months now. Today I finally found out the source: Amazon's delivery vans use that sound when backing up instead of the beeps that literally everybody else in the US uses. Like seriously, WTF Amazon?

Here's a link to the sound: https://www.youtube.com/watch?v=0_3jEla_ANs

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