A reliable means of protecting your home from unwanted intrusion is a sound alarm system. When it is triggered, there is a loud siren sound, which scares away intruders, attracts the attention of others, as well as transmits information about the intrusion to the security desk.
Types of acoustic intruder alarms
There are the following types of alarm systems:
- with output to a security console.
Each type has advantages and disadvantages, peculiarities of use, differences in composition and operation.
Wired alarm system is considered the most common and reliable. It differs in a small cost of equipment. If the object of protection is small and it is possible to lay a cable, this type is the most suitable.
Addressable system is suitable for both small and large premises. Information about the state of the sensors is transmitted by radio channel or with the help of wires. The price for installation and maintenance of this type of alarm system is low, but you need to spend money to purchase equipment.
The wireless alarm system uses only a radio channel to transmit data, which is not always convenient. It is characterized by a high cost of equipment with a small range. Sometimes there can be interference in operation.
The autonomous system does not provide for the transmission of a notification to the guard desk. This type of sirens has a low efficiency compared to the one that outputs the signal to the monitoring station.
Peculiarities of acoustic sirens
The purpose of installing such sounders is to prevent illegal intrusion into private territory. When an intruder intrudes, a loud sound appears, to which the watchman will respond and notify the neighbors. The information can be transmitted to a special service. Such a system is more often installed in holiday homes and in the surrounding area.
You can use any motion detectors, but people often choose sensors with an infrared sensor. They are more reliable than ultrasonic ones and cheaper than microwave ones. These detectors have a horizontal detection zone of 10-15 m and a 90-120° view.
Design and operation
Sound security detectors consist of motion sensors, control unit (module) and a siren. Sensors are constantly in standby mode, controlling the space. When motion appears, they are triggered and send a signal to the receiving and control module. A rechargeable battery is used to power this node.
Then the module sends information to the executive device. A loud siren sounds. Some security systems additionally turn on the lights, which increases the effectiveness of the protection. Information about the intrusion is transmitted to the security desk or to the cell phone number of the owner of the object.
Advantages and disadvantages
The main advantages of sound sirens:
- Sirens emit a harsh sound that is unpleasant to humans. It is impossible to be near the loudest models.
- “Howler” will be heard by the guard, neighbors or passersby.
- The installed obfuscator reduces the risk of intrusion, because the intruder does not know if it works.
- There is a large selection of models of varying cost. Everyone can buy the equipment at a price they can afford.
- Anyone can install a security system on their own.
If the motion sensor and siren are different devices connected by a cable, an intruder can detect the security system, disable it.
Regardless of the characteristics, all products must meet these criteria:
The equipment must have a certificate. This indicates that it is suitable for the conditions of this area.
There should be documentation of the tests carried out, the quality of products.
It is necessary to pay attention to the appearance of the product. There should be no dents, scratches or other defects.
If possible, it is better to buy an expensive model with a loud sound.
The device with a moisture-proof housing can be installed not only inside the house, but also outside, which increases the degree of protection against penetration.
In the absence of electrical power it is necessary to buy a diesel generator or a battery.
Installing a sound burglar alarm is an effective method of increasing security. The equipment does not require complicated installation and maintenance. The main thing is to choose the right one.