Speech intelligibility is not only an issue for people with normal hearing, but also for the hearing impaired. This applies to both hearing aid users with moderate to severe hearing loss as well as slightly hearing impaired people who are not yet necessarily dependent on a hearing aid - for example in the case of age-related hearing loss.
For example, when recording, so many background noises are often recorded with the speech track that it becomes almost impossible for people with audio impairments to understand the speaker. Simply making the voice track controllable does not help here, since amplifying the voice track would also amplify the ambient noise it contains. In order to counteract this problem, IRT is developing an algorithm that is intended to separate the pure speech signal from a complex audio signal.
In order to generally improve the possibilities for the distribution of a more speech intelligible audio signal, IRT works together with broadcasting and industry on the evaluation and further development of existing technical solutions, as well as on the international harmonization of subtitle technologies.