Side drum

...A large drum with a very shallow body and one side is called a gong drum. A small drum, which produces a hard, crisp sound, is also called a snare drum because several snares (resonating wires) are stretched in contact with the membrane on the side that is not the striking surface, and is also called a side drum because it is hung slightly to the left of the front of the body when playing while walking. A snare is a string made of gut strings or thin wire wound in a spiral shape.

*Some terminology that mentions "side drum" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…また胴が非常に浅い片面の大太鼓をゴング･ドラムという。　硬質で歯切れよい音を出す小太鼓は，打面でない方の膜に接してスネア(響線（ひびきせん）)を数本張るのでスネア･ドラムsnare drumともいい，歩行演奏の際に，体の前面やや左寄りにつるのでサイド･ドラムside drumともいう。スネアとはガット弦，あるいは細い針金をらせん状に巻いた弦である。…

※「side drum」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報