Participants:
Inclusion criteria were students of 3rd year and 4th year MBBS, either male or female, age between 19-24 years and individuals with normal hearing. Whereas, exclusion criteria comprised of students not giving consent, those with prior diagnosis of hearing loss, type I diabetes mellitus, acute upper respiratory tract infections, acute or chronic ear infections, allergic rhinitis, positive history for ototoxic drugs, past medical history of meningitis, enteric fever in childhood, past surgical history for cleft lip or palate, using hearing aid and family history of hearing loss.