Researchers in South Korea in Podcasts

They were used for just five minutes. The frequency chosen was 2.45 gigahertz. Using this method, the researchers aimed to stimulate the olfactory system of those who took part in the study. The stimulation itself was not directly perceived by the volunteers, according to the researchers, but their sense of smell improved. The scientists found that participants still performed better on smell tests a week after the radio wave session.