From the physical shape of obi, the word 'obi' is also adopted to things and concepts according to width, such as 'taiiki' (frequency range) and 'obi graph' (band graph) (both have the kanji, or Chinese character 'obi' on them).
帯の物理的形状から敷衍して「帯域」「帯グラフ」など幅を持った事物・概念にも適用される。