Using a Raspberry Pi, an Arduino, an Adafruit NeoPixel Ring and a servomotor, Japanese makers HomeMadeGarbage produced this Pronunciation Training Machine to help their parents distinguish ‘L’s and ‘R’s when speaking English.
As you can see in the video above, the machine utilises the Google Cloud Speech API to recognise their parents’ pronunciation of the words ‘right’ and ‘light’. Correctly pronounce the former, and the servo-mounted arrow points to the right. Pronounce the later and the NeoPixel Ring illuminates because, well, you just said “light”.
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