The lack of emotion in the stare can be very creepy. If it's just a cold, dead stare, without any hint of humanity or kindness. It gives the impression that whatever is doing the staring is not alive in the normal sense, or that it has no empathy. This makes the person on the receiving end feel very vulnerable and scared.
You can start by describing the type and volume of the noise. For example, a loud thunderclap or a soft rustling of leaves. Make it relevant to the scene or the character's emotions.
White Noise is typically classified as a postmodern novel. It incorporates diverse narrative techniques, explores themes of consumerism and media saturation, and defies straightforward categorization found in modernistic works.