Blue Horizon Mains Noise Analyser
The Blue Horizon Mains Noise Analyser is an easy to use instrument to measure the pollution and noise for each (wall) AC outlet in your house. Just plug it in and read the number displayed on the small screen and listen to the noise emitting from the small single driver firing out the back of the device. A review of this unit can be found on sixmoons. Price: 550 euro.