The adjective “oto-digital” is an artificial word used in the terminology of the “Digital Era Framework”. In this frame of reference, four spheres are defined on the basis of the type of manifestation of information, which allow the classification of events, phenomena and objects: The infosphere, which consists of the analog infosphere and the digital infosphere, the cognisphere and the entisphere.
The sensory organ of the ears is in its physical materiality part of the biosphere and thus of the entisphere. Referring, however, to its functionality the nexus to the cogniphere must be taken into account. Depending on the viewpoint, processes, phenomena and objects that are called “oto-digital” can be of an “enti-digital” or “cogni-digital” character.