Long Range Acoustic Device

A long range acoustic device (LRAD) is a really loud speaker that can make noises that are so loud, they can be heard from really far away. It's kind of like shouting or yelling, but instead of using your voice, it uses a special machine.

The LRAD has a big dish, kind of like a satellite dish, which helps it to project sound really far away. It's often used by people like the police or the military to communicate with or warn people who are far away.

Because the noise is so loud, it can be used to make people uncomfortable or even to protect against attackers. But it's important to use it carefully, because if the noise is too loud, it can hurt people's ears and even cause permanent hearing damage.

So it's like a big, loud speaker that can be used to project sound over really long distances.