Online entertainment is about sight and sound; everything is mediated through a glass panel and a speaker, leaving us well short of being immersed in an alternative reality. But with studies having demonstrated that more than half of human communication is non-verbal, scientists have been working on ways of communicating touch, taste and smell via the internet, and many of those experiments have been gathering pace.
“What do you smell?” asks Adrian Cheok, professor of pervasive computing at City University London. The whiff of melon is unmistakable; it emerged from a tiny device clipped to an iPhone and was triggered by Cheok standing on the other side of the room. “Right,” he says. “These devices have been commercialised in Japan – they’re selling 10,000 units a month – and they’re bringing smells into a social interface.” It’s still early days with this technology; the device I’m holding is similar to an inkjet printer in that it contains a melon “smell sachet”, and when it’s empty you have to buy another one. Nor is it a particularly new concept; in 1999, Wired magazine ran a front cover story about a company called Digiscents that had produced a USB “personal scent synthesiser” for your computer called the iSmell. Digiscents folded two years later. But the technology that failed to excite us back then now looks slightly less gimmicky in the context of modern smartphone usage, with its super- connectivity and emoticons galore.
On the surface, Cheok’s projects are fun, almost throwaway. “I’ve worked on hugging pyjamas,” he says. “They consist of a suit you can put on your body to virtually hug someone, remotely. Then we have these small haptic rings; if I squeeze my ring someone else will feel a squeeze on theirs through the internet – like a remote sensation of hand-holding.” He’s also been working on a device with electrodes that excites taste receptors on the tongue, producing an artificial sensation of taste in the brain. Similar work is also under way at the National University of Singapore, where a team of researchers is constructing a “digital lollipop” that fools the tongue into experiencing sweet, salt, sour or bitter tastes.