Range

Let's say - just for the sake of awfulness - that St. Louis' problem has become your cities problem.

Should it happen you'll need a way to find areas and locations where someone(s) decided those living there weren't ok the way they are.  That's why certain sets of messages and suggestions get used like they do.

You're gonna need some kind of super advanced technology to pinpoint those places and it probably needs the most sensitive microphones known to mankind.

Nope.  That's backwards.

You can gain long range search abilities with garbage.

It's fitting.  Don't worry about that now.

Whether you're familiar with resonance or not, you're probably seen kids banging on metal pipes to hear them ring.  That's all that's needed - a couple of matched metal pipes with a nice tone when tapped.

The other thing you'll need is a cell phone with a free frequency app.  Between a couple of metal pipes and a cell phone you can make the inaudible audible from a few thousand feet away.  You just need to set the metal pipes ringing at the right base frequency and beat frequency.

The best one to use where I'm living is about 30 Hz for the base frequency and 9 Hz for the beat frequency.   Play that on the cell phone at max volume, strap it to one of the metal pipes, then walk around to listen for voices where they shouldn't be.

Be sure to note some details about the area if you're unlucky enough to hear something:

• Median income.
• Median employment rate.
• What constitutes a majority there versus a minority?

I'm almost absolutely sure this won't be the case anywhere else... but I've never found voices where they shouldn't be in Ladue.  At least not yet.  Voices have been found in other locations as one heads northward.

That's just the way random chance plays out.