填空题 One word that you might have learned when you were studying about sound is frequency. Frequency means 1 fast the sound wave vibrates. Faster vibrations produce 2 pitched sounds. The notes in a musical scale indicate the 3 or frequency of the sound. 4 word that can describe a sound is intensity. Intensity 5 to the amount of energy in a sound wave, and it 6 a sound"s loudness. Printed music will often include notes about how loud or 7 to play each section of the music. Timbre is another 8 used to describe musical sounds. It describes how the same note will have 9 sounds when played 10 different instruments. For example the same note may sound soft and pretty when played on a flute, 11 strong and brassy when played on a trumpet. The timbre of a note comes from both the actual note 12 is played 13 also its overtones, 14 are other higher and lower sounds that are produced 15 the same time.