Hell Is That Noise/Literature

"Plib."
 * Dean Koontz's Phantoms will often include the descriptions of mundane sounds to help ratchet the tension, especially after some of the bodies have been discovered. Even though you're technically not hearing the sounds, the reader's own imagination is used against them with frightening results. This culminates later on when someone picks up the phone and starts hearing various mundane animal noises, which slowly turn into the sound of.
 * HP Lovecraft made extensive use of this one. Of particular note:
 * The "tekeli-li?" sound made by the shoggoths in At The Mountains of Madness. The narrator speculates that it may be a word in the language of the Elder Things, and the shoggoths are mindlessly parroting it.
 * It's the sound the birds make in Edgar Allan Poe's unfinished The Tale of Arthur Gordon Pym. ATMOM is based thereon.
 * The dripping sound in Cool Air, when Dr. Munoz' air conditioning stops working...
 * The gurgling sound on the telephone line in The Thing on the Doorstep
 * And the recurring cries of "I?I? Phn'glui mgl'wnafh Cthulhu R'lyeh wgah'nagl fhtagn!"
 * The creepiest idea August Derleth came up with in his questionable additions to the Cthulhu mythos was the phrase "Cthulhu naflfhtagn." We already knew "Cthulhu fhtagn" meant "Cthulhu sleeps," and it wasn't too hard to guess what the prefix meant...
 * The rats...can't you hear them!? It was the rats!
 * "glut! glut!" in A Tropical Horror, the sound made by the titular sea beast's razor sharp tongue striking flesh.
 * The Screwtape Letters: Screwtape writes to his nephew that in Heaven there is just silence and music, while in Hell there is the continuous noise.
 * In Michael Crichton's Jurassic Park, the T-Rex's roar, when first heard by the characters, is described as a horrifying, unbearable scream from another world. A character actually wets his pants while hearing it.
 * Gary Rydstrom, sound editor for The Movie, must have taken that description to heart, judging from the end result.
 * In the Harry Potter spin-off Fantastic Beasts and Where To Find Them, the Augurey's cry is scary enough for wizards to think it foretold death (it actually foretells rain).
 * Dolores Umbridge clearing her throat. "Hem-hem."
 * The sound the Dementors make.
 * "Avada Kedavra!"
 * 1984 has the disturbingly nonsensical song, "under the spreading chestnut tree, I sold you and you sold me. Here we lie, here lie we, under the spreading chestnut tree..."
 * It's even worse considering that in the end,.
 * The "lobstrosities" in The Drawing of the Three. "Dad-a-chee? Dad-a-chock?" Of course, those adorable questions come right before they
 * In the Discworld book Moving Pictures there is an instrument called a resograph ("thingness-writer"), which measures disturbances in the fabric of reality. It drops a small lead ball in the direction of the disturbance, which "...in severe cases may exceed --plib-- two pellets --plib-- during the course --plib-- of --plib-- one --plib-- month". Or to put it in other words...


 * The heartbeat from Edgar Allan Poe's "The Tell-Tale Heart."
 * The Haunting of Hill House - the noises outside of Eleanor's bedroom.
 * House of Leaves- The sound
 * The moan of an approaching zombie in World War Z. Or the nonstop moaning of an entire swarm...
 * In the Ravirn novels by Kelly Mc Cullough, Eris' laugh is frequently described by Ravirn as sounding like glass breaking. Also, anytime the Furies or Cerberus' three heads speak in complete unison.
 * In John Dies At the End, the sound of Korrok's otherworldly worm minions is described as "...fifty thousand men trapped on a desert island, deprived of food and water and sex but somehow kept alive for fifty thousand years. Then, after they've been tormented a hundred steps beyond insanity, tortured past self-mutilation and cannibalism, somebody drops off a sculpture of a naked woman made of T-bone steaks. If you could then capture the sound of them simultaneously fucking and eating and tearing her to shreds and broadcast it to the center of your skull at ten thousand watts, it would still sound absolutely nothing like what I heard."
 * In Changes, Harry fights a vampire-summoned Mayan primeval monster, a complete Implacable Man called the Ik'k'kuo. Harry notes that its heartbeat is incredibly loud... and when you are in a completely dark building, an increasingly loud thump-thump is not what you want to hear.
 * A Streetcar Named Desire features Blanche's Sanity Slippage and showcases this with her creepy auditory hallucinations of hearing a gunshot and polka music. There's also other loud sounds played on something like a trombone to depict tense scenes. This is used to to great effect in the 1951 movie version.
 * The War of the Worlds again, this time with the hammering that comes from the pit. In this case, Hell really is that noise, as it foreshadows the horrors to come.