Children frequently confuse pitch and loudness, assuming that a higher pitched sound is louder. Higher pitched sounds generate waves that are more closely spaced than lower pitched noises. A note's pitch is determined by a variety of things. Harshness or brightness of the tone color used to produce it will affect its pitch. The distance between wave crests or peaks will also determine how high or low a note can be played without becoming dull or sharp. Finally, the rate at which notes are played determines their pitch. It is true that if you were to compare the volume of two pure tones of the same frequency, but different intensities, then the one with less intensity would be considered as being quieter than the other one. This is because the amount of energy transmitted through a medium (in this case, air) is proportional to the square of the amplitude of the sound wave. Thus, a small change in amplitude results in a large change in power transmission. Furthermore, a quiet note is one that produces an intensity much less than 100 percent, while a loud note is one that reaches levels of over 100 percent. If you were to play several notes of the same octave but with different intensities, then the quieter one would be considered as being lower pitched than the louder one. The important thing to remember here is that pitch is just one factor that determines the sound of a note.