| Absence of response |
| Prolonged Wave I latency and absence of waves beyond Wave I |
| Wave V latency >6.2msec |
| Interaural latency difference Wave V(ILDV) >0.4msec or >0.3msec |
| Inter-peak latency(IPL) I-V≥4.5msec |
| Interaural difference of Inter-peak latency(IPL) I-V≥0.3msec |