How To Test If Child Is Suffering From Temporary Deafness?

respected sir, kindly help me my daughter is of i yr and 4 months. i found that she is unable to hear. i took her to an audiologist and he suggested me for some tests. after tests and MRI he suggested me of cochlear implant. now i am going to start for her therapy and cochlear implantation will be done after two months. i recently read abt ur discovery in 2007 that some childrem suffer from temporary deafness, r born deaf and were suggested for CI but later started hearing normally . R THERE ANY TESTS TO FIND OUT WHETHER THE child is SUFFERING FORM TEMPORARY DEAFNESS