Various tape-recorded noises/sounds made by UFOs

0:00 Clip 1, original upload: Sgt. Russell Yokum recorded the sound of a UFO hovering over the Columbia River, St Helens, OR, 1981
https://youtu.be/ELD-qcSdsg4
1:51 Clip 2, original upload: Guido Valentich on the disappearance of his pilot son Frederick after reporting a UFO, 1978
https://youtu.be/vhH_64Rh7fc
~01:51 reenactment (!), not the original audio.
~02:34 original audio of the "metallic sound" (courtesy of A.U.F.O.A - Australian UFO Action).
2:51 Clip 3: Beamship UFO sounds, recorded by Billy Meier, 1980; from the documentary Contact, 1987.

Beamship Spectrogram Comparison:
http://www.futureofmankind.co.uk/Billy_Meier/Beamship_Spectrogram_Comparison

Beamship sounds:
http://www.futureofmankind.co.uk/Billy_Meier/Beamship_Sounds

UFO Sound Recordings:
https://www.theyfly.com/PDF/UFOSoundRecordings.pdf

Thanks to: www.theyfly.com

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