The higher the frequency, the higher the pitch. During the Renaissance period, the saxophone was designed to vibrate at 446 Hz. The wavelength of a tone equals the velocity of sound divided by the frequency of the tone. Therefore, in a saxophone, the distance between waves is about two and one-half feet. As pitch changes, wave form changes.
Low pitch has long wavelengths and the high pitch has short wave lengths.
If two or more frequencies have simple ratios, they are called harmonics. The different pitches of notes go up in octaves. Knowing the frequency of one note makes it possible to know the frequency of all the other octaves of the note by multiplying or dividing by two. There are twelve notes in a full octave. The ones represented by letters are called whole tones.