## 3 Results
### e-Archeo Tactile  
e-Archeo Tactile is the haptic multimedia application (so-called tangible user interface, TUI) conceived and developed for the archaeological context of Cerveteri with the advice of experts in visual and auditory accessibility in order to guarantee a product that respects the universal design principles (Figure 13). The installation aims to involve the visitors by inviting them to interact with some objects reproduced three-dimensionally and materially, which serve as a medium for an audio-visual narration on screen. The themes proposed in the TUI relate to the Monte Abatone Necropolis with its various types of house-like tombs and an in-depth look at the Campana Tomb. This recropolis is presented to the public for the first time, albeit in virtual form. It is impossible to visit it in reality  
Figure 12: e-Archeo Voices: the eight topics of the podcast (by Lo Studio). because the archaeological excavation, which is still in progress, is covered yearly for conservation purposes. The multimedia station consists of a table upon which the 3D models and navigation buttons are installed, and an audio-visual system is placed above the table. Great care was taken in organising the table layout to meet tactile requirements (Figure 14). In the lower margin (the part closest to the user), there are buttons to start the experience and a legend of the three-dimensional contents on the table to begin the experience with this preliminary orientation information. In the right margin, six buttons start narratives about the necroolis and the Campana Tomb. The 3D models occupying most of the table represent the reconstruction of a portion of the Monte Abatone Necropolis and the detail of the Campana Tomb. A theme of reflection and experimentation concerned the relationship between the dimensions of the objects and the degree of simplification or detail to be conferred to ensure correct tactile perception. Initially, two reduction scales were planned: one showing the peculiar morphology of a group of Etruscan tumuli from the outside and one explaining the subdivision of the interior rooms and the fixed furnishings. Thanks to discussions with visual impairment experts who tested the prototype models, an additional level of detail was added, as the  
Figure 13: e-Archeo Tactile: some photos of the tangible user interface in Cerveteri (by Collettivo Digitale and accessibility experts). size of the model of the tomb interior did not allow for a tactile understanding of the furnishings of the individual rooms. The final version of the TUI consists of three models: the external reconstruction of a group of six tombs from Monte Abatone on the right; in the centre, the individual Campana Tomb sectioned to show the planimetric distribution of its rooms; on the left, an even larger sectioned portion of the Campana Tomb allows the fixed furnishings of some rooms to be recognised. A second theme of reflection and experimentation concerned the chromatic and tactile characterisation of the maquettes to allow the two primary materials to be recognised: soil and tuff. A legend in the table's information area indicates the colour and tactile texture attributed to the two materials. In this case, collaboration with accessibility experts made it possible to find tactile characterisations that were not too abstract--so that the 3D models could be universally understood--but at the same time were recognisable to the touch and did not make exploration difficult or unpleasant. The audio-visual narration is visible on the screen and can be activated by the buttons to the right of the maquettes. The contents are available with audio and subtitles in Italian and English, as well as in Italian (LIS) and International Sign Language (IS). The workstation software connects the users' actions with the multimedia content via Arduino microcontrollers. The audio diffusion is via directional speakers to not create sound pollution in the environment, and the magnetic induction amplifier with Bluetooth helps users with hearing devices.