Can you upload patient's BERA Report sir ?or tell me the decibel where Peak V is traced last . If her/his Impedance report is showing B type tympanogram it means there are few chances to be fluid in middle ear or some other outer ear problems so consult to your ENT specialist with all reports then he can tell you exact problem after clinical examination sir ( if you didn't show him yet ) And your ENT doctor will treat her/his that ear disease first and later will do BERA test again for knowing her/his actual hearing thresholds . So according to my knowledge your ENT / Audiologist is giving your baby a right line of treatment so do what he is suggesting you . Thanks