Radio detector can analyze personal emotional state1

Generally speaking, facial expressions are an important way to identify a person's mood and feeling, but in social interactions, many people are reluctant to reveal their true emotions. Have you ever thought that someone can know whether you are happy or sad through a computer or smartphone? Radio's mood detector, a device that emits radio frequency waves at a test subject and captures the reflected signal to measure his breathing pattern and heart rate. The data obtained is run by an algorithm that matches different emotional signals to physical factors and categorizes human emotions into four states: sad, angry, happy and joyful. In the experiment, the researchers had 12 participants sit about a meter away from the device and asked each to recall a private experience that made them feel a certain emotion, each for 2 minutes, while the device Heart rate and breathing rate are measured to gauge participants' emotions. The results show that the measurement capability of this device is quite accurate, with an accuracy rate of 87%. In addition, the researchers also improved the accuracy of the detection by making the body move. Because the wide movement of the ribcage helps the breath to escape the subtle influence of the heartbeat. The researchers also found that heart rate, rather than breathing rate, is the biggest driver of a person's emotional state.“indicator light”. After all, people can hold their breath, but their heartbeat is hard to control. The researchers hope that the related technology can be used to develop robot psychotherapists in the future, or advertising companies to collect feedback from audiences in a timely manner.

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