Hell Is That Noise/Web Comics

"Captain: …our flight to Tokyo. Captain: We kindly ask the attendants of the “Association of Oblivious Mothers with Infants Who Suffer a Fear of Flying” world congress –"
 * The cry of the bloodthirsty demon kittens in Sluggy Freelance: "mew."
 * Jack has a short arch called "Hell Is that Noise.'' Interestingly since sins speak in a distinctive font, you can recognise the voice of, say, Drip even if you can't see him.
 * Drip got his NAME from the sound of dripping. Context makes this terrifying.
 * Again with distinctive fonts representing voices, in Digger  speak in strange, scary fonts.
 * Schlock Mercenary also got distinctive fonts representing unusual voices. The Gatekeepers used to speak in scary fonts, but they don't any more. Later (Book 18) Galstandard Brown is represented by fancy squiggles and then Pa'anuri speech bubbles use weird font, but neither of those languages uses sound.
 * If you are on the wrong end of it then “Ommminous Hummm!” counts.
 * "Let The Squiddles Sleep (End Theme)" from Homestuck starts off cute enough before quickly degenerating into a mess of static and noise for the last two minutes. And then it was used for an animation in the main series...
 * As if that wasn't enough to establish it as Hell Is That Noise to everyone, characters and fandom alike, then came "[S] Equius: Seek the highb100d".
 * Even better:
 * Used in the most recent chapter of Hanna Is Not a Boy's Name, when they go to visit Tibenoch. They arrived at his house, and started hearing a creepy "tk tok" sound. And then more creepy things happened. And the "tk tok" sounds stayed with you for several strips, until 12:21, when the clock stopped. I'm still not sure what happened at 12:21.
 * In The Bongcheon Dong Ghost there's the creaking that.
 * Let's not forget the neck snaps. Dear lord, the neck snaps.
 * Sandra and Woo got a page titled simply "Hell".
 * Sandra and Woo got a page titled simply "Hell".