There are various devices that emit piercing sounds to discourage potential attackers, both humans and animals. Personal alarms are one of the non-harmful ways to self-protection. They give out loud noises that can instantly alert other people to your situation so they can come to your rescue faster.

Most personal alarms work automatically. They will continue blasting out the alarm even if they are taken from you. These alarms also enable you to defend yourself at a distance from a suspicious person or a vicious animal. Personal alarms will work well in crowded places as criminals prefer to be inconspicuous when carrying out their crimes. They don’t want the extra attention that a loud piercing sound does by leading people’s stares in their direction.