Within Folklore
How Movies Taught UFOs to Sound Alien
Films and television taught audiences to hear alien craft through electronic whines, drones, pulses, and metallic tones.
On this page
- Postwar saucer sounds on radio and film
- Electronic tones and metallic drones
- Why screen audio fed back into reports
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Introduction
The familiar sound of a UFO did not emerge from witness reports alone. It was built in cinemas, radio dramas and television studios during the decades when flying saucers became part of popular imagination. By the time many people claimed to hear strange humming craft overhead, audiences had already spent years listening to alien machines through loudspeakers: oscillating electronic tones, eerie whistles, metallic drones, pulsing vibrations and unnatural silences.
Science-fiction sound designers faced a practical problem. Alien spacecraft had no real-world acoustic reference. To make them believable, filmmakers invented a sonic vocabulary that sounded technological but unfamiliar. Those choices proved remarkably durable. Even today, many descriptions of UFO noises resemble sounds first popularised by post-war science-fiction rather than sounds from known aircraft. The result was a cultural feedback loop in which fiction helped teach audiences what an extraterrestrial vehicle ought to sound like.
Postwar Saucer Sounds on Radio and Film
The flying-saucer craze arrived at the same moment that electronic sound was becoming available to filmmakers. In the late 1940s and early 1950s, producers increasingly turned to unusual instruments and recording techniques to represent advanced technology, space travel and alien intelligence.
One of the most influential sounds came from the theremin, an electronic instrument played without physical contact. Its wavering pitch produced a voice-like tone that felt neither mechanical nor human. Although it appeared in several genres, science-fiction audiences quickly learned to associate it with extraterrestrial presence. Films such as Rocketship X-M and especially The Day the Earth Stood Still helped cement that connection. Critics and historians of film music have repeatedly noted that the instrument became shorthand for alienness in post-war cinema. [ACMI]acmi.net.auelectric sound sci fiACMIElectric sound in sci-fi25 Nov 2020 — The bizarre noise it's known for making is most commonly associated with the alien invasion in… [Reddit]reddit.comwhere did the outer space oscillating sound comeRedditWhere did the Outer Space "Oscillating" sound come from…Several early 1950s sci-fi movies employed the theremin to create eerie…
Bernard Herrmann’s score for The Day the Earth Stood Still (1951) was particularly important. Rather than using a traditional orchestral approach, Herrmann combined theremins with electric strings, organs, vibraphones and unusual percussion. The result was a hovering, unstable sound that seemed to emanate from the spacecraft itself rather than merely accompany it. Audiences hearing Klaatu’s saucer arrive were not just watching an alien vehicle; they were learning an audio language for alien technology. [Wikipedia]WikipediaThe Day the Earth Stood Still (soundtrackThe Day the Earth Stood Still (soundtrack [Wikipedia]WikipediaThe Day the Earth Stood StillThe Day the Earth Stood Still
Radio dramas contributed as well. Long before sophisticated visual effects became common, broadcasters relied on sound alone to suggest spacecraft and other worlds. Oscillators, feedback, tape manipulation and reverberation allowed producers to create machines that appeared advanced precisely because they sounded unlike familiar engines. The listener’s imagination completed the picture.
Electronic Tones and Metallic Drones
By the mid-1950s, science-fiction soundtracks moved beyond eerie melodies and began treating electronic sound itself as part of the environment. The most influential example was Forbidden Planet (1956), whose soundtrack by Louis and Bebe Barron abandoned conventional orchestral scoring in favour of self-built electronic circuits and manipulated recordings.
The Barrons described their work as “electronic tonalities” rather than music. The distinction mattered because many sounds functioned simultaneously as soundtrack and machinery. Audiences often could not tell whether they were hearing background score, alien computers or the spacecraft itself. That ambiguity helped define later expectations about UFO sounds. Alien technology became associated with continuous humming, bubbling circuitry, metallic pulses and evolving electronic textures. [Effectrode]effectrode.comEffectrodeThe Self-Destructing Modules Behind Revolutionary 1956…Suddenly a flying saucer appears on the black-and-white screen, and the… Wikipedia Several features of these soundscapes became recurring UFO motifs: [Wikipedia]WikipediaThe Day the Earth Stood Still (soundtrackThe Day the Earth Stood Still (soundtrack
- Sustained drones suggesting immense hidden power.
- Oscillating frequencies that rose and fell without obvious mechanical cause.
- Metallic resonances implying advanced machinery rather than combustion engines.
- Pulsing electronic rhythms resembling communication signals.
- Unclear sound sources, making it difficult to identify where the noise originated.
Unlike aircraft sounds, which usually reveal propulsion systems, these cinematic noises implied technology operating according to unknown principles. That distinction became important in later UFO folklore. Witnesses often described objects as sounding technological while remaining unlike jets, helicopters or rockets.
The influence spread beyond individual films. Television series including Lost in Space reused musical and sonic ideas developed during the 1950s electronic-science-fiction boom. Herrmann’s UFO-associated textures and the Barrons’ electronic experiments became part of a broader library of sounds that audiences encountered repeatedly across decades of science-fiction programming. [Wikipedia]WikipediaForbidden PlanetForbidden Planet
Why Silence Became an Alien Sound Too
An apparent contradiction emerged as science-fiction matured: some of the most advanced spacecraft became famous for making almost no sound at all.
This idea appeared because filmmakers increasingly wanted alien vehicles to seem superior to contemporary technology. Loud engines suggested mechanical limitations. Silence suggested mastery. A huge craft drifting overhead without any audible propulsion felt more unsettling than one producing ordinary aircraft noise.
Cinema amplified this effect by using contrast. Directors would remove ambient sound, reduce musical accompaniment or leave only a faint electronic hum. The absence of expected noise became a dramatic signal that something extraordinary was occurring.
This helped establish one of the strangest features of UFO folklore. Witnesses frequently describe objects as either emitting a low electrical hum or producing complete silence despite apparent speed and size. Those descriptions seem opposite, yet both stem from the same cultural idea: advanced alien technology should not behave like familiar machines.
Close Encounters and the Sound of Communication
If the 1950s established the sound of alien machinery, the 1970s added the sound of alien intelligence.
Steven Spielberg’s Close Encounters of the Third Kind (1977) transformed musical tones into a form of contact. Instead of presenting extraterrestrials as monsters or invaders, the film imagined communication through a simple five-note phrase exchanged between humans and a UFO mothership. Composer John Williams developed hundreds of variations before settling on the final sequence, performed through an ARP 2500 synthesizer. [Wikipedia]WikipediaClose Encounters of the Third KindClose Encounters of the Third Kind
The importance of those five notes extended beyond the film itself. They became a cultural signal instantly associated with UFOs. Even people who had never watched the entire film often recognised the melody. The motif suggested that alien craft might communicate through tones, pulses and structured frequencies rather than speech. [did you blank it?]didyoublankthat.wordpress.comdid you blank it?The Meaning of the Five Music Tones [Close Encounters of…May 4, 2020 — 4 May 2020 — The sounds made their way into po…
That shift mattered because it reframed unusual sounds from signs of machinery into signs of intelligence. A mysterious hum could now be interpreted not merely as an engine but as a message. Later UFO narratives sometimes described tonal sequences, rhythmic pulses or musical sounds in ways that echoed ideas popularised by Close Encounters.
The film also reinforced another recurring theme: that UFO sounds felt emotionally transformative. Williams’s musical language blended wonder, mystery and communication rather than pure fear. Subsequent UFO culture frequently alternated between these same emotional poles, treating strange sounds as evidence of either danger or contact.
How Screen Audio Fed Back Into UFO Reports
The relationship between science fiction and UFO reports was never one-way. Popular media supplied sounds that audiences learned to recognise, and those expectations sometimes appeared in later witness accounts.
Psychologists and folklorists have long observed that people interpret unusual experiences through familiar cultural frameworks. When an observer hears an unexplained sound in the sky, available cultural narratives help determine how that sound is described. In the twentieth century, science-fiction cinema provided one of the most influential frameworks for interpreting anomalous aerial experiences.
Several patterns suggest this feedback process:
- Witnesses often used vocabulary already common in science-fiction films, such as humming, buzzing, vibrating or metallic sounds.
- Reports increasingly described noises as electrical rather than mechanical, matching cinematic depictions of advanced technology.
- Accounts sometimes emphasised tonal qualities and frequency shifts similar to electronic soundtrack techniques.
- Silence itself became noteworthy because audiences had learned that extraordinary craft might operate without conventional engine noise.
This does not mean every report copied a film scene. Rather, cinema supplied a shared reference system. When people struggled to describe something unfamiliar, they reached for sounds already associated with advanced spacecraft.
The effect resembles how folklore develops more broadly. Repeated stories create expectations, and those expectations influence how future experiences are narrated. UFO sound reports and science-fiction sound design evolved together, reinforcing the same handful of auditory motifs across generations.
The Lasting Audio Vocabulary of UFOs
Many visual depictions of extraterrestrial craft have changed dramatically since the flying-saucer era. UFOs have appeared as discs, triangles, glowing spheres and abstract lights. Their sounds, however, have remained surprisingly consistent.
The classic palette still dominates:
- Electronic whines.
- Low-frequency drones.
- Metallic resonances.
- Oscillating tones.
- Rhythmic pulses.
- Near-total silence.
These sounds originated in practical creative decisions made by composers, engineers and sound designers searching for ways to represent the unknown. Yet they became something larger than film technique. They evolved into a shared cultural expectation about what alien technology should sound like.
When people imagine a UFO today, they rarely imagine the roar of a piston engine or the chug of industrial machinery. They imagine a hovering hum, a strange electronic vibration or an impossible silence. Much of that expectation was learned in dark cinemas decades before it appeared in folklore, witness narratives or modern UFO culture.
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Endnotes
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Source: acmi.net.au
Title: electric sound sci fi
Link: https://www.acmi.net.au/stories-and-ideas/electric-sound-sci-fi/Source snippet
ACMIElectric sound in sci-fi25 Nov 2020 — The bizarre noise it's known for making is most commonly associated with the alien invasion in...
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Source: reddit.com
Title: where did the outer space oscillating sound come
Link: https://www.reddit.com/r/AskHistorians/comments/qbe9rg/where_did_the_outer_space_oscillating_sound_come/Source snippet
RedditWhere did the Outer Space "Oscillating" sound come from...Several early 1950s sci-fi movies employed the theremin to create eerie...
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Source: Wikipedia
Title: The Day the Earth Stood Still (soundtrack)
Link: https://en.wikipedia.org/wiki/The_Day_the_Earth_Stood_Still_%28soundtrack%29 -
Source: Wikipedia
Title: The Day the Earth Stood Still
Link: https://en.wikipedia.org/wiki/The_Day_the_Earth_Stood_Still -
Source: effectrode.com
Link: https://www.effectrode.com/knowledge-base/the-self-destructing-modules-behind-revolutionary-1956-soundtrack-of-forbidden-planet/Source snippet
EffectrodeThe Self-Destructing Modules Behind Revolutionary 1956...Suddenly a flying saucer appears on the black-and-white screen, and the...
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Source: Wikipedia
Title: Forbidden Planet
Link: https://en.wikipedia.org/wiki/Forbidden_Planet -
Source: Wikipedia
Title: Close Encounters of the Third Kind
Link: https://en.wikipedia.org/wiki/Close_Encounters_of_the_Third_Kind -
Source: reddit.com
Link: https://www.reddit.com/r/movies/comments/15bxq18/close_encounters_of_the_third_kind/Source snippet
Close Encounters of the Third Kind: r/moviesI think it's both a metaphor but also very much how UFO reports affect people.... Alien Cre...
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Source: youtube.com
Title: The Day The Earth Stood Still | Soundtrack Suite (Bernard Herrmann)
Link: https://www.youtube.com/watch?v=utuDgREIS7QSource snippet
Music...
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Source: didyoublankthat.wordpress.com
Link: https://didyoublankthat.wordpress.com/2020/05/04/the-meaning-of-the-five-music-tones-close-encounters-of-the-third-kind/Source snippet
did you blank it?The Meaning of the Five Music Tones [Close Encounters of...May 4, 2020 — 4 May 2020 — The sounds made their way into po...
Published: May 4, 2020
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Title: the day the earth stood still 1951 complete score soundtrack review.2024
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The Day the Earth Stood Still (1951) - Complete Score...24 Dec 2008 — But, by far the most interesting cues are those depicting the alie...
Additional References
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Allusion and Teleological Genesis in John Williams's Close...19 Aug 2025 — This strange testimony gives us the first inkling of the over...
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Source: facebook.com
Link: https://www.facebook.com/groups/12117541695/posts/10159846801861696/Source snippet
As a musician and composer, CE3K was a huge influence on me. From the first time I saw it (junior high) I noticed how the first time we h...
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Source: reactormag.com
Title: 70 years ago forbidden planet changed science fiction cinema
Link: https://reactormag.com/70-years-ago-forbidden-planet-changed-science-fiction-cinema/Source snippet
70 Years Ago, Forbidden Planet Changed Science Fiction...25 Mar 2026 — It was set in the far future, with the entire film taking place a...
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Source: redsharknews.com
Title: 6553 forbidden planet was a landmark in film scoring
Link: https://www.redsharknews.com/audio/item/6553-forbidden-planet-was-a-landmark-in-film-scoringSource snippet
extraterrestrial chords that merge into a spinning propulsive sound matching the appearance from behind the audience of a flying saucer.R...
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Source: electricsheepmagazine.co.uk
Title: monsters from the id the music of forbidden planet
Link: https://www.electricsheepmagazine.co.uk/2013/08/19/monsters-from-the-id-the-music-of-forbidden-planet/Source snippet
Monsters from the Id – The Music of Forbidden Planet19 Aug 2013 — In any other film, this short burst of alien sonics would have stuck ou...
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Source: scifi.stackexchange.com
Title: Lacombe, the UFO expert, is shown in a conference
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is the point of the hand signals in "Close Encounters"?15 Jul 2012 — In "Close Encounters of the Third Kind", the aliens communicate with...
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Source: scifislacker.com
Title: forbidden planet electronic tonalities
Link: https://www.scifislacker.com/scifi-music/forbidden-planet-electronic-tonalities/Source snippet
Forbidden Planet: Early Experiments in Electronic Tonalities19 Feb 2011 — As the Saturn-shaped spaceship touches down on Altair IV, ther...
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Source: krotos.studio
Title: ten best sci fi films sound effects
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Exploring the Sound Design In Ten of the Best Sci-Fi Films...16 Apr 2024 — The iconic sounds of the Alien creature were developed using...
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Soundworks CollectionCreating the Music and Sound Effects of Forbidden Planet14 Mar 2013 — Electronic music composition and production we...
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