The image is a person's bald head. The person is facing the right and doesn't have a mouth or eyes. The person also doesn't have ears but there is a question mark on the person's head where the ear would be.
This Confusion icon has Android KitKat style
. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.