Shell Composition
The shell is the beating heart of your drums. Shell composition affects every nuance of tonal transference. After all, they are air chambers which happens to be the common vehicle for sound waves, air molecules. Approximately 1 million in a cubic inch of air, are put into motion by the kinetic energy transference as your stick strikes the drum head. Air molecules forced into an excited state of motion bouncing off the interior walls of the air chamber. Larger shell sizes slow down the molecules resulting in a slower cycles per second or hertz creating lower sound frequencies. Smaller chambers offer a more confining area for the excited molecules to move about which tends to accelerate them creating a faster modulation or higher frequency. These air molecules reacting with the shell creates the effect the we know as resonance. This why the interior composition of the air chamber has such a dramatic effect on the frequency response.