The standard horn on most modern cars is a trade-off between cost, durability and acceptable noise levels in the city. However, for drivers of SUVs, trucks or simply owners of powerful cars, the standard “squeaky” sound is often not enough. The road conditions are different and sometimes required. loudestTo warn other traffic participants of the danger.
In this article, we will discuss in detail what types of sound devices exist, how they differ in design and sound pressure. You will learn how to choose the right way. claxonIt will meet your requirements and what the law says about overly loud signals.
Many motorists do not think that replacing the beep is not just “put and forget”. It is an interference with the electrical circuit that requires understanding the load on the wiring and relay. The wrong choice can lead to overheating of contacts or even fire.
Types of car signals and their features
All sound devices for vehicles can be divided into several main categories. Each of them has its own physical principles of operation, volume characteristics and scope. Understanding these differences will help you make the right choice.
The first and most common type is electromagnetic horns. They work by oscillating the membrane caused by an electromagnetic field. Such devices are divided into disk (usually paired to create harmony) and carob (pipe). Carrot models tend to make a lower and more powerful sound, resembling the horn of a train.
The second popular option is pneumatic. Their principle of operation is based on the supply of compressed air to the membrane. They need a compressor and receiver to work. It is pneumatics that provides the same legendary, rolling and very loud sound that is associated with trucks or American “maslas cars”.
- 🔊 Electromagnetic: easy to install, do not require additional equipment, but are inferior in power to pneumatics.
- 💨 Pneumatic: They provide maximum volume and timbre, but require space for the compressor and regular maintenance.
- ⚡ Electronic: They allow you to play any tunes, but often have a latency and are not always taken seriously by other drivers.
⚠️ Attention: Installation of electronic signals with melodies ("Tsapok", "Vladimir heavy truck", etc.) can be regarded by inspectors as a violation of traffic rules, since they are not a standard warning tool.
Technical characteristics: decibels and frequency
When we talk about what we need loudspeakWe operate with physical quantities. The main parameter is the sound pressure level, measured in decibels (dB). The standard signals of passenger cars usually emit a sound in the range of 100-105 dB at a distance of 2 meters. For comparison, pneumatic systems can reach 118-125 dB.
However, volume is not the only important indicator. The frequency of sound measured in hertz (Hz) is critically important. The human ear is best at detecting the average frequencies (about 2000-4000 Hz). Low-frequency horns (100-400 Hz) are better at passing through engine noise and aerodynamic noise on the track, but they are less “sharp”.
When choosing a device, pay attention to the current consumed. Powerful. pneumoclax They can consume between 15 and 25 Amps at the time of inclusion. The standard wiring and relay of the car are often designed for 10-12 Amps. Direct connection of a powerful signal without upgrading the circuit is a direct way to melt contacts.
Legal aspects of setting loud signals
The desire to protect yourself should not conflict with the law. In the Russian Federation, the use of sound signals is regulated Traffic rules Technical regulations of the Customs Union. According to paragraph 19.10 of the traffic rules, to give a signal is allowed only for warning of danger or overtaking in populated areas.
The technical regulation (section 4, paragraph 4.1) states that the sound level of the signal must be at least 105 dB and not more than 110 dB at a distance of 2 meters from the front of the vehicle. Installation of devices exceeding this limit is formally a change in the design of the vehicle that has not passed certification.
There are also limits on the sound. It is forbidden to use multi-stage signals, as well as signals that reproduce special signals of emergency services (sirens, "drillers"). The use of such devices threatens not only a fine, but also confiscation of equipment.
| Signal type | Average volume (dB) | Complexity of installation | Risk of fine |
|---|---|---|---|
| Staffed | 100–105 | Low. | No. |
| Powered up electro | 110–115 | Medium | Medium. |
| Pneumatics | 118–125+ | Tall. | High-pitched |
| Electronic (melody) | Depends on the model. | Low. | High-pitched |
⚠️ Attention: Even if you install a certified loud signal, its use in a residential area or unnecessarily can be regarded as a violation of the rules for the use of external lighting devices and sound signals (Article ). 12.20 CAO.
Instructions for installation and connection
Installation process loudspeaker It requires accuracy and basic knowledge in the automotive industry. The main rule is never to connect powerful consumers directly to the button on the steering wheel. The standard button and wiring are designed for small currents of the relay control.
First, you need to remove the old signal. It is usually located behind the bumper or in the radiator area. If you are installing a pneumosystem, determine the location for the compressor (should be dry and protected from dirt) and the receiver. Relays and fuses are mounted as close to the battery as possible.
Connection is carried out according to the following scheme: plus the battery through the fuse goes to the power contact of the relay. The second power contact of the relay is on the signal. The control contact of the relay is connected to the standard signal wire (or button). The minus of the signal is connected to the mass of the body.
☑️ Checklist before installation
After assembling all the connections, be sure to check the tightness. Water is the main enemy of electrical contacts and membranes. Use heat shrinkage and high quality tape. If pneumatics are used, check all hose connections for air leaks with a soap solution.
Do I need to change the steering button?
95% of the time, you don’t need to change the button or steering switch if you’re using a relay. The relay takes on the power load, and the button only gives a weak control signal. However, if the contacts on the button are already burned, it is better to clean them or replace them, since weak sparking can lead to sticking of the relay.
Service and extension
When you install a powerful system, do not forget about its maintenance. Pneumatic signals Require regular drainage of condensate from the receiver, especially in winter. Frozen moisture can disable the membrane or block the work of the valves.
Electromagnetic devices also need care. Periodically check the reliability of the attachment to the body. Vibration from the operation of the signal itself can weaken the bolts, which will lead to rattling or falling of the device. It is also worth wiping the tube from dirt and insects, which can clog the hole and change the tone of the sound.
It is recommended to conduct an audit of electrical contacts once a year. Oxidation at the terminals of the relay and fuse increases resistance, which leads to a voltage drop and, as a result, a decrease in the volume of the signal. Cleaning contacts and spray-lubrication will return the system to its original power.
To make the pneumatic signal last longer, install a moisture separator in front of it (as in painting or air suspension systems). This will prevent oil emulsion and water from entering the horn membrane.
Comparison of popular brands and models
The automotive accessories market offers many options. Among the leaders in the production of quality sound-system The brands Hella, Bosch, FIAMM and Air Horn can be distinguished. German and Italian manufacturers have traditionally relied on the reliability and purity of sound.
Chinese counterparts may be attractive in price, but often claimed characteristics (for example, 130 dB) are not true. In addition, the resource of such products is often lower: the membrane can “tire” after six months of active operation. When buying, pay attention to the material of the case: brass and high-quality steel are preferable to cheap plastic or silumin.
When choosing between a one-way and two-way signal, give preference to the second option. Two signals of different frequencies (high and low) create a beating effect that the human ear perceives as more alarming and noticeable, even if the total volume in decibels is the same.
A high-quality two-ton signal from a well-known brand (Hella, Bosch) is often louder and more efficient than a cheap “super-horn” from the aliexpress, even if the box is written with fantastic numbers.
Can I make a pneumonia signal from an old compressor?
Theoretically, you can use a compressor from a refrigerator or air suspension, but in practice it is difficult. You will need to collect a control scheme, provide protection from moisture, correctly choose the receiver and the horn itself. Homemade designs are often less reliable and more noisy (in terms of engine operation) than ready-made kits.
Why did the signal become quieter over time?
The main reasons: oxidation of contacts (voltage drops), ingress of dirt or water inside the socket, fatigue of the metal of the membrane. In pneumatic systems, the cause may be air leakage or reduced compressor performance.
Does frost affect the volume of the signal?
Yeah. In electromagnetic signals in the cold, plastic and metal can tan, changing the resonance. In pneumatic systems, the condensate can freeze, completely blocking the work. Also, the battery capacity in the cold drops, which reduces the current available for the electromagnet.