The answer to 'why is my centipede scratching sounds' is that centipedes may make scratching or scraping sounds as they move around. This is usually caused by the centipede's many legs and feet rubbing against surfaces as it crawls. Centipedes have a hard exoskeleton and their legs can make noticeable sounds, especially in quiet environments.
Centipedes are nocturnal predators that hunt for small insects, spiders, and other prey. The scratching sounds are often a sign that a centipede is actively moving around your home, searching for food. While the sounds can be alarming, they are generally not a cause for concern unless you see the centipede itself or have an infestation.