The second biggest factor that affects drum sound is head tension against the shell. When the hoop is placed around the drum head and shell and tightened down with tension rods, the tension of the head can be adjusted. When the tension is increased, the amplitude of the sound is reduced and the frequency is increased, making the pitch higher and the volume lower.
I have been playing piano since the early 1980s, and I earned a Bachelor of Music with an audio production and piano focus from Ithaca College as well as a Masters in Music in keyboard collaborative arts from the University of Southern California. For the past 20 years, I’ve been a professional music director and have performed myriad musical styles on different instruments in concert halls and on nightclub stages. I also taught music for 10 years at a private Los Angeles middle and high school.
The sound of electronic drums and cymbals themselves is heard by the drummer and possibly other musicians in close proximity, but even so, the foldback (audio monitor) system is usually fed from the electronic sounds rather than the live acoustic sounds. The drums can be heavily dampened (made to resonate less or subdue the sound), and their tuning and even quality is less critical in the latter scenario. In this way, much of the atmosphere of the live performance is retained in a large venue, but without some of the problems associated with purely microphone-amplified drums. Triggers and sensors can also be used in conjunction with conventional or built-in microphones. If some components of a kit prove more difficult to "mike" than others (e.g., an excessively "boomy" low tom), triggers may be used on only the more difficult instruments, balancing out a drummer's/band's sound in the mix.
Dual coil "humbucker" pickups, sometimes abbreviated to DC pickups, have two signal-producing coils that are reverse-wound around opposed polarity magnets (similar in principle to the two individual J-pickups or the two halves of a modern Precision pickup, only in a single housing). This significantly reduces unwanted noise from electromagnetic interference compared to single coil pickups. Humbuckers also often produce a higher output level than single coil pickups, though many dual-coil pickups are marketed as retrofits for single-coil designs like the J pickup and advertise a similar output and tonal character to the stock single-coils. Dual coil pickups come in two main varieties; ceramic or ceramic and steel. Ceramic-only magnets have a relatively "harsher" sound than their ceramic and steel counterparts, and are thus used more commonly in heavier rock styles (heavy metal music, hardcore punk, etc.).