Idea of Mute Icon
It is a classic mute icon. There is a basic speaker with the letter "x", or what could be a cross icon to the right of it. You can clearly see the back and front of the speaker. You would not think sound is coming out of this speaker.
This is the Mute icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.