Ma'anar ma'anar kalmar "babban mita" yana nufin kewayon raƙuman lantarki ko raƙuman ruwa wanda ke da babban adadin oscillation ko rawar jiki a kowane na biyu. Gabaɗaya, babban mitar tana nufin ƙafar da ke haifar da fiye da wani ƙofa, wanda ake yawanci ma'anar raƙuman ruwa ko sama da 3,000 Hertz (MHZ) don raƙuman rediyo 20,000. Ana amfani da yawan raƙuman ruwa na mita a aikace-aikace daban-daban, kamar sadarwa mai rediyo, irin hoto, da sauran mutane.