Canadian Civil Liberties Association v. Toronto Police Service, 2010 ONSC 3525.
Long Range Acoustical Devices (“LRAD”), colloquially described by the media as sound or sonic cannons, operate in two ways: in their “Voice” mode as a powerful loudspeaker or megaphone and, in their “Alert” mode, as the emitter of a high decibel, narrow frequency, focused set of sound waves. The Toronto Police Service (“TPS”) recently purchased four LRADs – three body-pack ones, and one mounted on a boat. A few weeks ago the Ontario Provincial Police (“OPP”) bought three LRADs – one body pack style and two tripod-mounted models.