“…[34][35][36][37] According to WHO, the target price for an "affordable" hearing aid should be no more than 3% of the per capita of the user's country. 34 When this definition was proposed, 3% of the per capita gross national product of Bangladesh, India, Kenya, Malawi and Nigeria was 26, 46, 26, 10 and 43 United States dollars (US$), respectively.…”