Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
In-ear sleep sensor. (A) Right earpiece and its location inside the ear. (B) Prototype earpiece worn in ear. (C) Prototype electronics platform, comprising low-power microcontroller, analog front end for physiological signals, Secure Digital memory card, and 110 mAh battery.
