Which environmental factor can negatively impact sleep quality?

High noise levels can significantly disrupt sleep quality by causing awakenings or preventing the individual from reaching deeper stages of sleep. Noise can stimulate the brain, making it more difficult to relax and fall asleep, and even low-level sounds that are not consciously noticed can disturb sleep cycles. For individuals who are sensitive to their environment, unexpected sounds—such as traffic, neighbors, or electronic devices—can lead to fragmented sleep, which ultimately reduces overall restfulness.

In contrast, consistent room temperature contributes positively to sleep by creating a comfortable atmosphere conducive to relaxation and rest. Complete darkness is ideal for sleep as it helps regulate the body’s circadian rhythm, signaling that it is time to rest. Comfortable bedding further enhances the sleep experience by providing physical support and comfort, allowing the body to relax without discomfort. All these factors play a role in promoting healthy sleep patterns, making high noise levels a notable outlier that negatively impacts sleep quality.