Posts Tagged ‘Ikinamo’

The Utterance Robot that Speaks Like Humans

December 30, 2021

I hope everyone’s still enjoying the Christmas season. I know I haven’t posted anything political over the past few days, or even much at all, but I thought I’d try to leave the important, emotive subjects till after the holiday. Well, that’s not going to happen, as I’ve found a few videos on very serious issues I’d like to post and comment on. But first some fun.

This is another robot video, from the ikinamo channel of YouTube. It’s about professor Hideyuki Sawada and his team at Kagawa University, who have created a robotic version of the human mouth in order to mimic real, human speech more closely. The mouth looks like a long, flesh-coloured tube, below which are a series of rods which rise and fall to manipulate it. The mouth also has a tongue, The machine is operated by a pump, which pushes air into the mouth through vocal chords. Above the mouth itself is a plaster nose to add resonance, the plaster having the same resonance as a human nose. The robot needs this to make the ‘m’ and ‘n’ sounds, while its tongue allows it to say the ‘r’. The changes in the mouth cavity and movements of its artificial lips create the same types of sound as a biological human mouth. The machine also has a microphone so that it can hear itself. It possesses autonomous learning, so that it can correct its mistakes by listening, and working out what a particular sound should be. It’s not quite right just yet, as it has no teeth and so can’t pronounce the dental fricatives. However, they are teaching the pitch and words to a Japanese song so that it will be able to sing that.

Something very like this robot was created by Klemper, a German scientist, in the 19th century. He also reasoned that in order to create speech mechanically, you should start with a mechanical mouth. As he was German, the machine also spoke with a German accent. And back in the 1980s I read an article in one of the popular science magazines around then that the way to solve problems with robot and computer speech would be to build an artificial mouth, so that the machine would speak like a human would.

Like the various types of artificial muscle being developed, this is clearly another example of robotics engineers following nature in their quest to create machines that function like humans and animals more closely. It’s ingenious, but does look weird as a disembodied, mechanically operated mouth and nose.