Chill Mega Chill holiday wallpaper
In 1997, the US National Oceanic and Atmospheric Administration, using their bottom-mounted hydrophone array as part of the US Navy’s Sound Surveillance System, detected an ultra-low frequency sound of extraordinary power in the middle of the Pacific Ocean. Recorded and nicknamed the Bloop, this cryptogenic noise rapidly rises in frequency over the course of one minute and was of significant amplitude to be detected throughout a vast area of the ocean floor. Experts have analyzed the audio profile (shown above) of the Bloop and have determined it to be of mysterious origin, rather than man-made (i.e. submarine, explosion) or natural (i.e. earthquake, volcano). In fact, the Bloop’s audio profile most closely resembles that of animal, albeit louder than any other previously recorded animal sound, with the loudest being the blue whale.
To this day, the source of the Bloop remains a mystery and is a part of an exclusive list of unexplained oceanic sounds detected by the NOAA.
An isolated structure, typically built of concrete, acoustic mirrors were used to reflect and concentrate sound waves. The mirrors were designed to collect the sounds of enemy aircraft and focus/amplify the sound unto a stationary microphone placed in front. Such devices were thought to provide early warning, as well as improved location detection, of enemies approaching. However, with the exponential growth of technology during wartime, the acoustic mirror development program was overshadowed by the advent of radar and soon discontinued.
Notable location includes the Denge air force site on the Dungeness peninsula near Hythe in Southeast England.