Alarms and deterrents that emit high-frequency sound, which are designed to deter a potential attacker and draw the attention of passersby to the situation. An assortment of this type also effectively deters animals such as dogs and cats. In this category, in addition to the recently popular electronic sound alarms, there are also whistles, which are effective not only in various sports, but also in medical rescue, as well as in survival in the broadest sense.
Sound alarms are one of the most effective means of personal defense. Such devices emit a high-pitched sound with a volume of 100-120 decibels, causing annoying ear pain and attracting the attention of bystanders. They are very simple to use, well, activation of the alarm is usually done with a button located on the top of the device or by removing the so-called safety pin. At the same time, maintaining a compact size that allows the alarm to be conveniently carried every day in a purse or pocket.
Ultrasonic animal repellents are also available among such devices. These are devices that emit waves of inaudible ultrasonic sound at a frequency that causes fear in dogs, as well as cats and other quadrupeds, audible within a radius of up to 15 meters. The ultrasonic dog and cat repellent also has a training/training mode, emitting sounds of similar frequency to the repellent mode, but of much lower intensity.
