Idea of Audio Wave Icon
It is a sequence of perfectly vertical lines. The lines are uniform in weight/width, but vary in height. They are all vertically aligned along an invisible horizontal center line. The lines vary from shortest to medium to longest, then back down to shortest. This pattern repeats one more time.
This is a Audio Wave icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.