Hearing loss refers to the partial or complete inability to hear. This condition affects people of all ages and may be inherited or acquired after birth. Mixed hearing loss, conductive hearing loss and sensorineural hearing loss are the three types of hearing loss. It has various signs and symptoms such as difficulty in hearing consonants, muffling of speech and other sounds, withdrawal from conversations, and difficulty in understanding words. Hearing loss can range from mild to moderate to severe. It makes hearing high pitched sounds or conversational speech difficult, and can affect one or both ears. The causes of hearing loss include a variety of factors such as certain infections, some toxins or medications, genetics, trauma to the ear, exposure to noise, and birth complications. Medical treatments, hearing aids, cochlear implants and other options are used to treat and manage hearing loss. This book contains a detailed explanation of the various diagnostic and therapeutic techniques associated with hearing loss. It will help new researchers by foregrounding their knowledge on this medical condition.