Ko te hiri miihini he taputapu hiri poutū mīhini hurihuri, e pā ana ki te iti rawa o te takirua o te mata pito e poutū ana ki te tuaka hurihuri o te mata o te pito i roto i te pēhanga wai me te utu mō te mahi tahi o te kiko rapa (aukume rānei) me te hiri āwhina, kia mau ai te paheke o te whakapiri me te whanaunga, kia hanga ai hei taputapu hei karo i te turuturu o te wai. Ko te mahi matua o ngā hiri miihini ko te aukati i te turuturu o ngā hau me ngā wai i roto i ngā tono poutū hurihuri. He whānuitia te whakamahinga i roto i ngā whakaritenga hiri miihini mō te papu, te whakaoho, te compressor me ētahi atu taputapu rite,Ngā hiri miihini paerewate tikanga ka wehea kia rua ngā wāhanga o te hiri miihini me tehiri miihini kāterei roto i te tikanga whakahiato. Ā, ka taea hoki te wehewehe i te hiri o te pou miihini kihiri miihini puna kotahi,ngā hiri miihini puna ngaru, Elastomer raro hiri mīhini ,hiri miihini whakarewa rarome ētahi atu. Ka taea e mātou te whakarato i ngā momo hiri miihini paerewa maha o ngā waitohu rongonui pērā i a Eagle Burgmann, AES, John Crane me Vulcan.
