Is France's capital city lying to its citizens about a new audio surveillance project?

Anyone whos visited France or who keeps track of the nation's doings through the news, knows that its a nation thatll put up with a lot of bullshit -- being overrun by tourists, loud talkers, or smiling at strangers -- provided said bullshit doesnt infringe on the quality of its citizens' lives. The Paris government is arguing that excessively loud vehicles falls on the infringement list. At first blush, it looks like they're trying to do something about it.

From Engadget:

Parisians with powerful cars might want to think carefully before showing off their rides. Parts of the city (most recently the suburb of Villeneuve-le-Roi) are testing a "noise radar" system from Bruitparif that can pinpoint loud vehicles and, eventually, ticket them. The system uses four microphones to triangulate the origins of a sound and link it with CCTV footage to pinpoint whoever's making the racket.

Just shy of 40 of the devices are in use so far, primarily near bars in Paris' entertainment regions as well as 17 around major buildings.

It sounds like a great idea, but I suspect that there might be something greasy going on here. The technology being put into use sounds suspiciously similar to the gunshot locator systems manufactured by ShotSpotter and a few other tech firms. ShotSpotters website provides a basic lesson on how the technology works:

Acoustic sensors are strategically placed in a coverage area. When a gun is fired, the sensors detect shots fired. Audio triangulation pinpoints gunfire location and machine-learning algorithms analyze the sound.