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The biggest problem for deafblind people is social isolation. Ofcourse they can read books printed in Braille or write a letter using a Braille keyboard, but this is not the same as talking with somebody.
is to provide a technical solution which allows deafblind people to talk with somebody as similar to a normal talk as possible.
![](assets/4-ABC FIPS für Sehende.xlsx)
The system shall allow for full duplex communication
The system shall use the haptic capabilities of the human fingers
There shall be one device to be used with one hand for sending the information
There shall be a second device to be used with the other hand for receiving the information
In buildings the communication link between devices shall use WLAN
In the field the system shall use mobile infrastructure like 4G and 5G.
The devices shall use Bluetooth to connect to mobile phones as links to the mobile infrastructure
Sender and receiver device shall be designed with best ergonomic properties in mind
The sender device shall have 5 contacts, one for each finger
The contacts shall provide haptic feedback when pressed
The receiver device shall have 5 contacts, one for each finger
The contacts shall provide a haptic feedback when an information is sent to that finger.
The kind of haptic feedback shall allow for use over several quarters of an hour without leading to artifacts in the sensation of the fingers.
The devices shall be able to operate from batteries (rechargeable).
Battery lifetime tbd h (reasonable/acceptable)
The devices shall be capable of processing at least 10 keystrokes per seconds