Current AAC Devices cost thousands of dollars and are slow, bulky and not generic. Talk has made two major breakthroughs by increasing speaking rate and becoming the world's most affordable AAC device.
Talk expects a person to be able to give two distinguishable exhales (by
varying intensity/time) for converting into electrical signals using MEMS Microphone.
It is quite Light and Portable being just 10x6x2 cm in dimensions and
weighs not more than a regular smartphone. On a single charge it runs
for more than 2 days and is quite comfortable to wear. It takes only
0.8sec to dictate the letter 'A' and 0.4sec for the letter 'E' using
Talk, making it the fastest AAC device in the world. Talk can be made
available at less than $100, making it the most affordable. With an
accuracy of almost 100% and innovative features - 9 voices (male/female)
for different age groups, 2 modes (communication/command-phrases) and
encoding there is nothing which can compete with features of the device.
Talk uses Breath as the medium of interaction between the user and
device.
https://www.googlesciencefair.com/projects/en/2014/dde56de014edae3e9516ac84d426641f372ba076d6f6b60a4809306f43b58bc6
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