Acoustic alarm systems have been used to provide warnings in emergencies during ages. Hitting on various metal objects was used in ancient times; Later bell towers were constructed for this purpose and at the beginning of the twentieth century rotating mechanical sirens began to appear. These are basically made up of an electric motor with a specially treated head that emits a sound as it rotates. Even now these sirens are used in many countries. The development of electronics, however, has also influenced this area and the first electronic sirens began to appear in the late twentieth century. Electronic sirens are basically electronic high-performance acoustic signal amplifiers such as home audio systems. However, these sirens operate with substantially higher outputs and are given specific demands in terms of desired extreme reliability and different methods of their control. The control infrastructure must also be reliable and two independent control channels are usually required. The loudspeakers of these amplifiers are placed in specially designed sound deflectors and reproduce the signals stored in the digital memory of the siren or signals fed to the siren from external sources - a microphone, telephone, radio station, radio broadcast and common television , etc.