> Also, is it illegal for a civilian to own and use one? I doubt it, it's basically just a large beamforming loudspeaker. I'd consider deploying them if I had

> Also, is it illegal for a civilian to own and use one? I doubt it, it's basically just a large beamforming loudspeaker. I'd consider deploying them if I had a property I wanted to secure against wildlife or criminal elements. Granted, in cases where you operate it in a way which caused illegal harm to a person's hearing, you may be subject to negligence litigation. It would be wise to operate it at the lowest level which generates the desired effect, I suspect the police are more haphazard with their deployment because (fair or not) they are subject to less strict standards of behaviour in practice. Added: LRAD corp. markets the device mostly for law enforcement/public safety, military, and emergency notification, however they also market it for private users in wildlife control, and there doesn't seem to be anything said about legal concerns (though it's possible that there's an existing process controlling use of devices for similar purposes such as propane cannons). Obviously any law concerning the propagation of loud noises in general would apply with LRADs all the same. A civilian user would not likely have an opportunity to use an LRAD outdoors in a populated area.