Otology is a branch of medical science that deals with the diagnosis and treatment of diseases and disorders related to the ear. Some of the major pathologies associated with the ear include otitis, tinnitus, balance disorders, Usher syndrome, hearing loss and Meniere's disease. There are a number of different types of diagnostic tests performed to examine a patient. Audiogram is a common diagnostic test used to measure hearing sensitivity. Tympanogram test is performed to examine the function of the middle ear while vestibular test is done to measure inner ear function. Electronystagmogram, posturography, and videonystagmography are some other diagnostic tests performed within this field. Otological treatment is based on the specific type of ear disease or condition. Some common treatments for ear related conditions are surgery, hearing aids, cochlear implants, medication, and ear tubes. Surgery within otology generally involves the mastoid and middle ear. A few types of surgical procedures performed under this field are tympanoplasty, mastoidectomy and ossiculoplasty. This book includes some of the vital pieces of work being conducted across the world, on various topics related to clinical techniques in otology. It consists of contributions made by international experts. Researchers and students in the field of otology will be assisted by this book.