According to United Nations’ World Health Organization, there are approximately 278 million people worldwide suffering from moderate to profound hearing loss. It is not surprising that many of those people have particular difficulty with telephone communications and programs through the Internet. When telephone conversations are conducted via computer networks using the Internet Protocol, ambient noise and acoustic echoes often impede the conversation. For the hearing impaired, it is especially problematic - most of the time they need to increase the volume to try and follow the conversation. However, by doing so, the background noises are also intensified and signal frequencies become virtually intolerable. In response to this growing problem, developers at the Fraunhofer Institute for Digital Media Technology IDMT in Oldenburg have come up with a digital solution.
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