percussion instruments [3]
Group of instruments that are struck directly with the hands or with sticks, mallets, etc. to produce a sound.
kettledrum 
Instrument consisting of a parabolic copper basin covered with a stretched membrane that is struck with mallets.
caster 
pedal 
Device connected to the crown that adjusts the tension of the membrane to change the tuning of the instrument.
crown 
Plate raised and lowered with the pedal to adjust the position of the tie rods.
tension rod 
Metal rod connecting the crown to the tie rods.
strut 
Metal frame with several branches; it supports the shell.
shell 
Parabolic copper basin that functions as a sound box.
tuning gauge 
Part used to adjust the pitch of a note and obtain precise tuning of the instrument.
tie rod 
Metal part connected to the tension rod; by adjusting the tension of the batter head, it changes the drum’s pitch.
batter head 
Membrane that is struck with a mallet.