A steady hum emanating from the object.
The UFO was about two to three car lengths wide and made a soft hum- ming sound.
In the late summer of 1968 at 2 a.m. a married couple(names confidential on file) reported seeing a dome-topped UFO with "windows" and odd-colored lights(yellow, blue and red fixed together) flying near their Lake Norman home. The UFO was about two to three car lengths wide and made a soft hum- ming sound. A "metal rod" came from the bottom edge of the UFO, as it moved down nearby power lines, almost touching the wires as it followed the power lines.
Strange buzzing noise.
Two or three 6-ft tall human-like beings moved around a domed disc resting on tripod legs, entered via ladder, took off with humming sound.
It was heading in the same direction as the car and emitted a humming sound.
Elaine McGowan also observes the object, which was giving off a humming sound.
Two witnesses observe a red, rectangular object, with a pulsating light and emitting a humming-type sound.
The object was rocking gently to and fro. Suddenly a multicoloured band began to rotate inside the windows and a witish mist thickened around the object, wich emitted a faint hum. The witnesses became aware of a sulphurous smell.
Statistical Analysis On Recorded Observations of the Hudson Valley UFO "Boomerang" (Night Siege: The Hudson Valley UFO Sightings, Hynek and Imbrogno with Pratt, ISBN 0-345-37086-4).
Sound -> Humming:
March 17, 1983 = 50%
March 24, 1983 = 24%
April 10, 1983 = 57%
July 12, 1984 = 18%
Time not given. A 13-year-old boy working at a kennel in Williston, Florida heard a humming noise, and noticed that the dogs were attempting to hide in their pens and whining. As he went out to investigate the area turned red with illumination, and a bright red disc-shaped object hovered only 20 feet over his head. He felt heat coming from the object. When he returned to the dog pens, the dogs barked at him and would not let him inside. (Sources: Robert Gribble, International UFO Reporter, May 1984, p. 16; MUFON UFO Journal, May 1984, p. 11).
8:05 PM. Five people in Llano, Texas, witnessed a huge dome-shaped UFO fly over their house at only 200 feet altitude. It made a loud humming noise and had lights on the rim. A jet aircraft was seen in pursuit of the UFO. (Source: International UFO Reporter, May-June 1984, p. 16).
Illustration by witness Tim Todd.
Tim Todd. There was a very distinct humming, exactly like a large transformer hums.
|Disc|Dome|Hover|Humming|Power Lines|Missing Time|Speed|
...quiet, low humming craft with 2 bright banks of lights (what appeared to be rather halogenic red/clear/blue), approximately 500-1000ft above ground.
Reported humming sound from craft.
The aircraft made a humming noise, not like an airplane but more like the sound of a computer humming.