SilenceAir keeps the noise out

Engadget HQ is currently located 12 feet away from a construction site, so we're all over SilenceAir, a line of transparent, noise-blocking bricks which let light and fresh air in while keeping noise out. Each brick is embedded with passive resonators that block everything between the 500Hz to 2kHz range, and are adjustable if you live near a highway or have particularly (or peculiarly) loud neighbors.

[Via
Meta-Efficient]