Wikipedia: Hyperacusis - Article on this condition which is characterized by an over-sensitivity to certain frequency ranges of sound. Includes causes, symptoms and treatment. Deafness Research UK: Hyperacusis in Children - Factsheet providing information on this condition, how the symptoms are managed in children, and behavioral and auditory desensitisation. Deafness Research UK: Hyperacusis - Factsheet on this condition explaining what it is, how common it is and how the symptoms are managed. Hyperacusis Network - Informal organization providing support for individuals with reduced tolerance to sound. Hyperacusis Information Site - Dr Marsha Johnson, M.S. provides information on this condition, its evaluation, symptoms, diagnosis, research and treatment. Hyperacusis - Article by David M Baguley, MSc MBA, first published in the Journal of the Royal Society of Medicine. Chicago Dizziness and Hearing: Hyperacusis - Information provided by Timothy C. Hain, MD on this condition, its causes, diagnosis and treatment. Noise Sensitivity / Sensitive Hearing - Read a personal account of hypersensitive hearing problems and the links between the condition and magnesium deficiency.