A polite way of saying STFU.
The Sound Level Sign demonstrates a fun, low cost solution to a growing urban problem. As the level of disruptive noise increases The Sound Level Sign will bear an increasingly disgruntled face and a disapproving message to drivers. By framing the issue as an information problem (in the vein of the “Your speed is…” signs) The Sound Level Sign will reduce local noise pollution without the need for further government regulation, police enforcement, or expensive sound insulation. In addition, The Sound Level Sign can run on solar and battery power which makes it easy to install and operate off the grid.