D ▁port ra its , ▁ 3 D ▁figur ines ▁or ▁mini - me ▁figur ines . ▁ ▁Communic ation ▁ ▁Emp loy ing ▁add itive ▁layer ▁technology ▁offered ▁by ▁ 3 D ▁printing , ▁Ter ah ert z ▁devices ▁which ▁act ▁as ▁wave gu ides , ▁cou pl ers ▁and ▁b ends ▁have ▁been ▁created . ▁The ▁complex ▁shape ▁of ▁these ▁devices ▁could ▁not ▁be ▁achieved ▁using ▁conventional ▁fabric ation ▁techniques . ▁Com mer cially ▁available ▁professional ▁grade ▁printer ▁ED EN ▁ 2 6 0 V ▁was ▁used ▁to ▁create ▁structures ▁with ▁minimum ▁feature ▁size ▁of ▁ 1 0 0   µ m . ▁The ▁printed ▁structures ▁were ▁later ▁DC ▁s put ter ▁co ated ▁with ▁gold ▁( or ▁any ▁other ▁metal ) ▁to ▁create ▁a ▁Ter ah ert z ▁Pl as mon ic ▁Device . ▁In ▁ 2 0 1 6 ▁artist / s cient ist ▁Jan ine ▁Car r ▁Cre ated ▁the ▁first ▁ 3 d ▁printed ▁vocal ▁per cussion ▁( be at box ) ▁as ▁a ▁wave form , ▁with ▁the ▁ability ▁to ▁play ▁the ▁sound wave ▁by ▁las er , ▁along ▁with ▁four ▁vocal ised ▁emot ions ▁these ▁were ▁also ▁play able ▁by ▁las er . ▁ ▁Dom estic ▁use ▁ ▁Some ▁early ▁consumer ▁examples ▁of ▁ 3 d ▁printing ▁include ▁the ▁ 6 4 DD ▁released ▁in ▁ 1 9 9 9 ▁in ▁Japan . ▁As ▁of ▁ 2 0 1 2 , ▁domestic ▁ 3 D ▁printing ▁was ▁mainly ▁pract iced ▁by ▁h ob by ists