High-pitched sounds, like the sounds of the piccolo in the Figure below, have high-frequency waves. The frequency of sound waves is measured in hertz (Hz), or the number of waves that pass a fixed poi...High-pitched sounds, like the sounds of the piccolo in the Figure below, have high-frequency waves. The frequency of sound waves is measured in hertz (Hz), or the number of waves that pass a fixed point in a second. Use the Violin simulation below to play different musical notes and observe the graph of Frequency vs Amplitude produced by the violin strings vibrating at different tensions: How is the pitch of sound related to the frequency of sound waves?