ATI has discussed low frequency hum noise previously. There is now a project to map locations with reported hum noise using a Google World map.
Mapping Project for the HUM- A large group of concerned people and a couple of hard working organizers who want to get the bottom of the insidious Hum effecting tens of thousands (and those visitng this site) are asking you report your locations where the Hum is sensed. Please visit “thehum.info” and add your locations onto the Google map. If you experience difficulty let me know.
Thank you we need your help.