I'm looking for a simple icon to represent vibration. It can't be too similar to the sound icon because I'm going to put it right below a sound icon (the speaker shape). I was thinking something with waves but I'm not too sure. Maybe you guys would have some ideas?
Try representing vibration with three jagged horizontal lines parallel to one another. Think of the lines on a seismograph that monitors earthquakes.
If I need inspiration I go to shutterstock and see what the keyword gives me
for example -