Field drum - Construction
The shell of the modern tenor drum is usually made of wood; The drum’s construction is basically the same as that of the snare drum, the two heads being braced by screws. The tenor drum is considerably deeper, however, and its head diameter is somewhat larger.
Orchestral models occasionally have an adjustable damper (a soft felt disc about 5 cm in diameter) for the batter head. The degree of damping can be adjusted by means of a screw.
Unlike the tenor drum the field drum has snares, which are made of a lightly coiled metal wire.
Some models have heads which are still rope tensioned after the fashion of the medieval side drum; A criss-crossing or straight drum rope presses the two hoops against each other. The tension is regulated by moving the leather braces which each hold two strings.