Watch the video again to reflect about our science investigation yesterday and to see how long it takes Mike Boyd to achieve this task. 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.