probably a system sound that was covered up when there was radio traffic with Earth.
Mike Collins said many years ago in "Caryying the Fire" that NASA engineers told him the sound was due to interference between the LM and CSM VHF radios. It only occurred when they were in close proximity.
What is interesting to me is that it was classified until 2008--nearly 40 years. This tells me that they weren't 100% sure it was not aliens.
Quote from: Danderman on 02/22/2016 01:13 amprobably a system sound that was covered up when there was radio traffic with Earth.I believe a more likely explanation is that aliens were performing Dark Side of the Moon, on the Dark Side of the Moon.
Probably it was the result of a couple of factors IMO: the gain on the radio receivers would have automatically cranked up, and thus picked up electronic interference from the other equipment in the spacecraft. Computers in those days were known to project radio emissions that could be picked up by radios. Here is a video of an old DEC computer generating interference that is picked up by a transistor AM radio:
PDP8/e - That takes me back to when I was doing my CSE Computer Studies (UK school exam for 15/16 year olds) back in '75. we had use of a PDP8/e with all of 4K of core store
Quote from: Warren Platts on 02/22/2016 03:56 amWhat is interesting to me is that it was classified until 2008--nearly 40 years. This tells me that they weren't 100% sure it was not aliens.Maybe it's just that NASA was 100% sure that releasing the tapes would generate a lot of nonsense about aliens that it did not want to deal with.
which would explain its prolonged period of classification.