Medical News Today -- New research commissioned by the National Institute for Health Research Health Technology Assessment (NIHR HTA) programme will assess the clinical and cost-effectiveness of bone anchored hearing aids (BAHAs) for people who are bilaterally deaf (deaf in both ears). Hearing impairment is the most common sensory deficit and it is estimated that there are approximately 688,000 severely to profoundly deaf adults in the UK. According to evidence given to the House of Commons Health Committee, the NHS tariff puts the cost per person of conventional hearing aid provision from appointment and clinic time to use of equipment at about £270. The price of a working BAHA per patient is estimated to be at least £4500.