Suddenly, an eldritch shriek curdled the air. I whisked around, but the room was empty... unless there was someone on the other side of my bedroom door.
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My hands flew to my ears at the sound of a scream overhead. Bethany glanced over from her salad, concerned. "You okay, dude?"
"Yeah. Did you hear that?"
"Hear what?"
I don't answer her. My eyes are fixed skyward, but whatever made the noise is already long gone.
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The screaming follows me all day, belting out screeches at random times. Whether it's a hallucination or a ghost, I don't know, but it sure makes the school a whole lot more sinister.
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Here are just some descriptions I came up with. Sound can be described in more than one way: pitch, volume, tone, direction, distance, how resonant it is, context, how the protagonist reacts, and how others react, to name a few. Instead of focusing only on where the sound is, perhaps you can try making it interesting by adding other important details. (Similes and metaphors, too, if they're not cliched)
I'm just a 15 y/o writer myself and this might not be professional advice, it' just my own opinion - but I hope you found this helpful! Have fun writing :D