The portable machine, to be used for ‘riot control’ can cause dizziness, headaches, vomiting and even heart attack China has claimed to have developed the world’s first portable sonic device for crowd disperse, a research shows. Researchers at the Technical Institute of Physics and Chemistry at the Chinese Academy of Science said the device, which uses low frequency sonar, has passed their assessments including a trial test on the body. The project is a joint effort from the academy, the People’s Liberation Army medical centre, and police research lab. Sonic devices used in other countries can cause extreme discomfort such as dizziness, headaches , vomiting, organ damage and even heart attacks. However, researchers did not state the effects the newly developed weapon could pose on a human, according to their website . Professor Xie Xiujuan, who led the research, said the device was powered by a tube-shape vessel containing an inert gas. When heated, the gas particles vibrate and a deep, monotonous sound is emitted, according to South China Morning Post. The team has passed the budget proposal at a meeting on September 4, and approved it for mass producti...