Previous genetic studies in humans also showed that the catalase (CAT) [18], glutathione S transferase (GSTM1) [19], cadherin (CDH23) [20], hOGG1 [21], HSP70 [22], KCNE1, and KCNQ4 [23] were related to the development of NIHL. Here, CAT is linked to noise induced hearing loss.