Watch the video to see how long it takes Mike Boyd to achieve this task of shattering glass with his voice. Tap to your journal. Tap or take a :screenshot: of the phenomenon and draw, share something you learned or a question you have about vibration and pitch. Tap and share your learning. Tap and add to your STEM journal. You can shatter a glass with your voice but it isn't easy. The pitch must match the natural frequency of the glass and the volume must be high enough to physically vibrate the glass.