Grades 6–8 · Arts & Music
Why does a snare drum snap and buzz after a strike?
A snare drum has a stretched head at each end of a shell. The player usually strikes the upper head, while a set of wires or other snares rests against the lower one. Those hidden parts explain much of its distinctive sound.
The upper head vibrates after the strike. Motion couples through the enclosed air and the drum’s structure, exciting the lower head. As that head moves, the snares move against it, adding a rapid rattling sound to the drum’s vibration.
The wire line sits outside the bottom head; the cutaway separates these parts so their contact is visible.
A strainer mechanism can bring the snares into contact or release them. With the snares away, the drum still sounds, but much of the sharp buzz disappears. This separates the sound source of the drumheads from the extra texture produced by their contact with the snares.
Tension and contact matter. Snares that barely touch, press too firmly or sag unevenly respond differently. Real drums also have many interacting vibration modes, so the result is richer than one simple back-and-forth movement.
A musician changes timbre by controlling how parts exchange vibration. The same struck head can belong to noticeably different sounds because another vibrating system is allowed to join in.
About this explanation
Motion is enlarged and only a few parts are shown; real drum response includes air, shell and many head modes.
Starting knowledge: Understand vibration, sound and the distinction between pitch and the character of a sound.
Sources
- Yamaha Corporation — What are drums made of?
- Yamaha Corporation — Anatomy of a Snare Drum