Taste change of soup by the recreating of sourness and saltiness using the electrical stimulation

We change and amplify the taste of soup by stimulating the tongue electrically. Humans can feel electric taste at the moment of electrical tongue stimulation. Electric taste includes metal taste, saltiness, sourness, and bitterness. Giving electric taste while eating will enable the amplification of taste without increasing intake of sugar and salt. Our system recreates sourness and saltiness, and changes the taste of soup by giving electric taste while eating. The subject eats soup with a spoon which has an electrode attached to it. When the spoon touches his or her tongue, a circuit is formed and stimulates the tongue electrically. To evaluate this system, we performed an experiment where the subject evaluates the taste of soup when the system stimulates the tongue electrically. The experimental results show that anode stimulation amplifies acidity, saltiness and taste strength.