**7. Conclusion**

Hearing loss is one of the most common sensory defects that affects about 5% of the world population. Genetics is a major contributor to deafness causing about 50% of all cases. Although elucidation of the genetics of hearing loss has advanced rapidly in the past 20 years, still lacking is a complete understanding of all the networks and pathways required for normal audition. In future, continued studies will reveal further insights into function of the auditory system and treatment due to its malfunction.
