Police Use Anti-riot Sound Device, Journalist On-site Reported Sickness

At 2:40pm on 17th November 2019, two Unimog armoured personnel carriers were deployed by the police during the battle against protesters outside Polytechnic University. One of the carriers was believed to be equipped with Long Range Acoustic Device (LRAD), an anti-riot sound device.

Our journalist on-site felt slightly sick immediately after the three-second duration first use of the device. The journalist believed that the device were turned to full power during the use.

According to civil rights organisations and foreign studies, LRAD could cause permanent damage of hearing, shortness of breath, dizziness and visceral resonance, or even unconsciousness in severe cases.

City Broadcasting Channel (CBC)

Editorial Board, CityU SU

The Stand News

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LRAD Study Report (Jürgen Altmann, 1999)