Each potential pedestrian alert was posted on YouTube and is available by clicking on one of the four videos embedded below.
Choice A sounds like an intergalactic coffee machine, brewing a Martian mochachino:
Choice B sounds like a subtle leaf blower you use in your Zen garden:
Choice C sounds like a tiny bamboo didgeridoo harkening all to some tribal rite:
Choice D sounds like a hairdryer as heard through the bathroom door of a space shuttle:
Some from the Facebook peanut gallery objected to all four: "At least make it sound like a car, and offer several choices like a Mustang GT, a regular Focus or an RS Focus rally car," one wrote.
Ford also asked which word should describe the sound with options including futuristic, precise, clean, and quiet.
One cryptic commenter wrote, "How about supercharged Stang with a pair of Cherry Bombs?" Here's to sonic innovation!