» Hum Forum    Yahoo Group for discussion of mysterious hums.    http://groups.yahoo.com/group/humforum/

» Hum Haunts Indiana City; Its Source Is a Mystery    New York Times article about a mysterious low-frequency noise reported by residents of Kokomo, IN.    http://www.nytimes.com/2002/06/23/national/23KOKO.html

» Taos Hum Page    Information and links about the "Taos Hum," a low throbbing sound heard in quiet locations worldwide, especially in the USA, UK, and northern Europe. It is not detectable by microphones or VLF antennae, and the source is still a mystery.    http://www.eskimo.com/~billb/hum/hum.html

» The Guns of Barisal and Anomalous Sound Propagation    Discussion of research into the physics behind mysterious sounds resembling cannon fire, heard at Barisal, India, and other locations around the world.    http://www.du.edu/~jcalvert/waves/barisal.htm

» The Hum    Investigation into the cause and adverse health effects of the Bristol Hum, an obnoxious low-frequency noise heard in England. Conclusion is that the hum is due to a pulsed electrical signal.    http://homepages.tesco.net/~John.Dawes2/

» The Moodus Noises    Account of the legends and modern accounts of the mysterious sounds heard in Moodus, Connecticut.    http://www.curbstone.org/index.cfm?webpage=96

» Things That Go Boom in the Night    Article about the Moodus (Connecticut) noises and the findings of recent investigations that linked these noises with seismic activity.    http://www.gi.alaska.edu/ScienceForum/ASF8/896.html

» Unexplained Sounds    About.com page gathers together information about mysterious booms, persistent hums, and underground rumblings that defy explanation. Includes audio clips.    http://paranormal.about.com/library/weekly/aa031599.htm