Hi everyone,
Here is a video of sound recordings made by Apollo 10 astronauts in 1969 when they were on the far side of the moon. They all heard some weird... wooo... sounds that were unexplained. The secret sound files have been released recently. Some technicians believe it is interference from the radios of the two modules.
http://www.ndtv.com/world-news/nasa-releases-strange-music-heard-by-1969-astronauts-1280166?pfrom=home-lateststories***********
NASA has made public a recording of strange "music" that astronauts reported hearing in 1969 while on the far side of the Moon, out of radio contact with the Earth.
The story behind these unusual whistling noises was showcased on Sunday night in a show on the cable channel Discovery, as part of a series called "NASA's Unexplained Files."
The noises reportedly were heard in May 1969 by the Apollo 10 astronauts as they circled the Moon, months before the first astronauts stepped foot on the lunar surface on July 21 that same year.
The three astronauts on board were Thomas Stafford, John Young and Eugene Cernan.
The sounds, which lasted about an hour, were recorded and transmitted to mission control in Houston.
A transcript of the text was released in 2008, but the actual audio has only just been made public.
"You hear that? That whistling sound?" asks Mr Cernan, describing it as "outer-space-type music."
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Maybe that's how the 'woo' word that you guys keep referring to was born!

Cheers.
Sriram