Wifi tooth to monitor eating and speaking habits Hao-hua Chu, a computer scientist at the National Taiwan University who supervised the project, said: "The human mouth is one part of the human body that is almost always in constant use. We use our mouth to perform some of the most important daily functions, such as eating, drinking, speaking, coughing, breathing and smoking. Because the mouth is an opening into human health, this oral sensory system has the potential to enhance exiting oral-related health care monitoring applications such as dietary tracking. The prototype, which is fixed into the mouth during denture cement, currently uses thin wires to connect it to a computer. It must also be taken out to be cleaned and to recharge the battery. During the tests, the scientists also attached a safety string to the tooth to prevent any of the participants from swallowing it while they were wearing it. They asked eight users to chew gum, drink, talk and cough to evaluate its accuracy for gathering data. They found that it could classify activities with up to 93% accuracy. However, the researchers say that each device would need to be calibrated to each person due to differences in the way their mouth moves when chewing and talking.