Here are some simple icon designs. I like how easy clean they are and each one has a specific opening to it that allows the icon to be a part of the background. I also like how they are all see through and tie in well the background also.
This is Ideographs which are used to tell an idea faster without any words. To show/express ideographs you can use (<>). These angled brackets are also used by rhetorical critics. In short words ideographs are symbols to tell an idea without words. For example we know that a green sign with a arrow is telling us where is the exit. So is the hear.