This study aims to find if using special earbuds, called NextSense ear-EEG devices, and glasses can help us study sleep and wakefulness without the need for uncomfortable wires usually used in sleep labs. In traditional sleep studies, people wear wires connected to different parts of the body to measure brain activity (EEG), eye movements (EOG), and muscle tone (EMG) to understand sleep stages. This study will test if the new devices can do the same job.

• Participants will stay overnight in a sleep lab and then do wakefulness tests the next day.
• During the study, participants will wear both the new earbuds and glasses.
• Participants must be healthy adults aged 18-60, live near Atlanta, and have regular sleep habits.

Volunteers will stay awake 4 hours longer than usual before sleeping for 3-4 hours. The next day, they will do tasks to test alertness and memory while wearing the devices. The study checks if these new tools can replace traditional methods in sleep research.