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Previews Pulse

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For added atmosphere, play the music from this trailer while reading on.
Trailers love to play up excitement and mystery, and as of The New '10s, one favorite way to do this by tickling the ears with an unusual sound. One of these sounds is the Previews Pulse. It is often created by an instrument known as a blaster beam which creates a single chord which ends up sounding technological and mysterious. Other methods are through mixing several instruments, usually bass, or altering the sound of a horn.
These "pulses" are used in trailers to create a feeling of sudden tension, similar to a Scare Chord, but are rarely used in the movie itself, as it may be distracting. A trailer that uses them is often made up of rapidly cut snippets, with the chord announcing with each new scene.
Not to be confused with Heartbeat Soundtrack, another common trailer trope.

Examples
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Kinds of Kindness
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ForzaHorizon
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DBTropes
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Rise of the Planet of the Apes: Sound familiar? The chord does show up in the film once, as spear-wielding apes appear on a roof.
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featureApplicability
1.0
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 Rise of the Planet of the Apes
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type
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Endgame areas of Borderlands 2 use this liberally, especially in areas with volcanic activity or severe industrialization, as well as transitions into and out of combat.
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featureApplicability
1.0
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 Borderlands 2 (Video Game)
hasFeature
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type
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Teenage Mutant Ninja Turtles: Out of the Shadows uses the classic blaster beam pulses in the beginning of its trailer.
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1.0
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 Teenage Mutant Ninja Turtles: Out of the Shadows
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type
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Modern Warfare 2 also had one during the "No Russian" mission.
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featureApplicability
1.0
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1.0
 Modern Warfare (Video Game)
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Battleship's trailer used these upon reveal of the aliens.
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1.0
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 Battleship
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Cowboys & Aliens's is fairly muted, but it culminates at 2:07.
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1.0
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 Cowboys & Aliens
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The Wolverine's first trailer features one, 1:20 minutes in.
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1.0
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1.0
 The Wolverine
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The score of Princess Mononoke begins with two reverb-heavy pulses from a massive taiko drum.
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1.0
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 Princess Mononoke
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Pacific Rim has one in its first trailer, though it's much less loud and more high than most examples.
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1.0
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 Pacific Rim
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Fallout 3: Mothership Zeta's Death Ray uses a sound similar to the later Inception pulse. Oddly, the laser weapons in Fallout 4 sound like this as well.
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1.0
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1.0
 Fallout 3 (Video Game)
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X-Men Film Series:
The Wolverine's first trailer features one, 1:20 minutes in.
X-Men: Apocalypse: There are several of these in the SDCC and the teaser trailers.
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1.0
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 X-Men Film Series
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How It Should Have Ended: Superman brings up this trope in this episode of Super Cafe, about the then-recent Man of Steel trailer.
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1.0
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 How It Should Have Ended (Web Animation)
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12 Years a Slave: Pops up around thirty seconds in.
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1.0
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 12 Years a Slave
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Halo.
In Halo 2, a blaster beam hit is heard when the Covenant blow up the Malta and Athens space stations. There's also the bass pulse in "Impend" and "Heretic, Hero", and the Arbiter's Invisibility Cloak sound.
In Halo 4, the orange pulses used to scan the UNSC Forward Unto Dawn create a noticeable rumble, possibly from the ship shaking from the scans.
Spartan Ops: The recovered Forerunner artifact in Episode 5 gives ominous pulses as the crew approaches to study it.
 Previews Pulse / int_755b343f
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Mass Effect 3's trailers had them. The "pulse" is actually in-universe: it's the sound the Reapers generate when charging their massive beam cannons. It also is apparently a pitched-down version of the Inception sound.
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1.0
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 Mass Effect 3 (Video Game)
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District 9's second trailer featured pulses of many sizes. They're in-universe, to boot - they're the sounds the ship makes. One shatters every window in Johannesburg.
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1.0
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 District 9
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In a 10 O'Clock Live segment on the media's treatment of the Japan earthquake in 2011 showed Sky News doing this with a preview for its upcoming coverage, accidentally underlining their own tastelessness in dramatizing a real disaster in such a way when it was immediately followed by a trailer for Game of Thrones that used exactly the same style.
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 10 O'Clock Live
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The alarms in Dishonored have this type of sound.
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1.0
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 Dishonored (Video Game)
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World War Z has a distinctly electric variant in its first trailer.
Honest Trailers lampshades them as "Obligatory Inception Bwaaahhs".
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1.0
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TRON: Legacy plays one as Sam first enters the Grid and sees a Recognizer. Its trailer isn't free of them either.
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1.0
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 TRON: Legacy
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The Transformers Film Series, particularly the trailers for Revenge of the Fallen and Dark of the Moon.
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1.0
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 Transformers Film Series
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Played with a bit, in that this is not quite the "laser" type of pulse; the use of Steely Dan's "Dirty Work", in the promotion of The Suicide Squad (2021), trailers and commercials, were punctuated by pulsing guitar riffs for each new clip, as well as Dan shouting "YEAH!".
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1.0
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1.0
 The Suicide Squad
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Alien: The Unbuilt Ur-Example is likely the trailer. Here, it is a remixed and drawn out sonar ping, and is much more high pitched and unnerving. Bonus points for the Heartbeat Soundtrack mixed with this in the trailer. The combined effect of the sonic ping sounding like a surreal warning alarm, the varying heartbeat and additional sound layering is astonishingly effective at creating a sense of terror even today.
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Call of Duty: Modern Warfare 3: Another chord from Hans Zimmer himself.
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1.0
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 Call of Duty (Video Game)
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Diablo Swing Orchestra's "Justice for Saint Mary" (the final track off Pandora's Piñata). At 5:45 into the song, just after the final chorus, there are two low-pitched trombone notes, signaling to the listener that the song is about to kick it up a notch.
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Axiom Verge features pulses in its title theme, also used in the PS4/PSVita announce trailer, and the intro of "Apocalypse".
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1.0
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The second The Avengers trailer had some instances of this, coupled with Loki's Hannibal Lecture. So did its third trailer.
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1.0
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 The Avengers (2012)
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The Rise of the Tomb Raider: 20 Year Celebration trailer.
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1.0
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 Rise of the Tomb Raider (Video Game)
hasFeature
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type
Previews Pulse
 Previews Pulse / int_d5166b43
comment
In Halo 2, a blaster beam hit is heard when the Covenant blow up the Malta and Athens space stations. There's also the bass pulse in "Impend" and "Heretic, Hero", and the Arbiter's Invisibility Cloak sound.
 Previews Pulse / int_d5166b43
featureApplicability
1.0
 Previews Pulse / int_d5166b43
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1.0
 Halo 2 (Video Game)
hasFeature
Previews Pulse / int_d5166b43
 Previews Pulse / int_d5166b45
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Previews Pulse
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In Halo 4, the orange pulses used to scan the UNSC Forward Unto Dawn create a noticeable rumble, possibly from the ship shaking from the scans.
 Previews Pulse / int_d5166b45
featureApplicability
1.0
 Previews Pulse / int_d5166b45
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1.0
 Halo 4 (Video Game)
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Honest Trailers lampshades them as "Obligatory Inception Bwaaahhs".
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1.0
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 Honest Trailers (Web Video)
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X-Men: Apocalypse: There are several of these in the SDCC and the teaser trailers.
 Previews Pulse / int_f38b1d2f
featureApplicability
1.0
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1.0
 X-Men: Apocalypse
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Prometheus used these, coupled with a strange howl taken from the original trailer for Alien.
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featureApplicability
1.0
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1.0
 Prometheus
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Red Riding Hood goes for the horn.
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1.0
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Forza Motorsport 6's soundtrack has pulses obviously cribbed from Inception in "Starting Grid", "From Flag to Flag", and "Blow the Lid Off", though no pulses were used in the actual trailers.
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Inception is one of the most famous examples, featuring a distinctive sound in the trailers that became memetic. Buttons for it exist.
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1.0
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The following is a list of statements referring to the current page from other pages.

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Coming Attractions
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Fear Tropes
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Sound FX Tropes
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 Life (2017) / int_4fe592e9
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 Prometheus / int_4fe592e9
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 Red Riding Hood / int_4fe592e9
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 Resident Evil: Retribution / int_4fe592e9
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 Rise of the Planet of the Apes / int_4fe592e9
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 Rogue One / int_4fe592e9
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 Saw 3D / int_4fe592e9
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 The Counselor / int_4fe592e9
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 The Wolverine / int_4fe592e9
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 Transformers Film Series / int_4fe592e9
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 TRON: Legacy / int_4fe592e9
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 Wonder Woman (2017) / int_4fe592e9
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 X-Men: Apocalypse / int_4fe592e9
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 Diablo Swing Orchestra (Music) / int_4fe592e9
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 Terra Nova / int_4fe592e9
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 The Book of Boba Fett / int_4fe592e9
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 Halo 4 (Video Game) / int_4fe592e9
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 Regular Show: The Movie / int_4fe592e9
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