Why do turn signals rattle? Sometimes the frequency gets faster, and you can't think of that for a reason
Have you ever noticed that every time you turn, the car makes that clicking sound? This sound actually comes from our turn signal, which is not just a simple sound, but has important functions and complex technology. When the turn signal is flashing, the sound is generated by the relay being turned on and off, and this mechanical sound system was very common in early automobiles. However, with the development of technology, the clicking sound in modern cars may be simulated by means of electronic buzzers. This sound not only helps the driver to concentrate, but also effectively reminds the driver to turn off the turn signal in time to avoid confusion for other road users.
When it comes to the click, you may take it for granted that it is just a simple mechanical function, but there is a lot of technology and design ideas behind it. In older cars, the source of this sound is a relay. Every time you turn on the turn signal, the relay turns on and the bulb flashes with a single click. This is actually caused by the rapid opening and disconnection of the contacts inside the relay under the current drive. What you may not know is that there are many more uses for this design than just the basic flashing function.
First, the existence of this clatter sound is actually a reminder to the driver: "Hey, your turn signal is on!" "Have you ever forgotten to turn off your turn signal, only to notice the strange look or pointing of the driver around you, and then realize that the turn signal is still flashing? At this time, if there is such a clattering reminder in the car, can this embarrassment be avoided in time?
Second, the frequency of the clicking sound is actually a small intelligence. Normally, the rhythm of this sound is even, but if you hear it suddenly "speed up", it's probably a light bulb hanging up. At this time, a bulb does not light up, the total resistance of the circuit decreases, resulting in the acceleration of the capacitor charge and discharge cycle, the relay will be more frequent, and the sound will naturally be urgent. In this way, the clicking sound is not only a reminder, but also a troubleshooting tool.
However, technology is advancing, and the relay method of old cars is gradually giving way to more modern electronic control systems. On a new car, the clicking sound you may hear is no longer a real relay sound, but is simulated by an electronic buzzer. In doing so, the designers have retained the familiarity of the rattling sound while avoiding the physical malfunction problems that can come with relays.
For example, some new trams or high-end models may already have fully electronic control of their steering system, and they don't even use a small screw. In this kind of system, the original clicking sound is a bit out of place if it is still implemented with traditional relays. This is where a simple little buzzer can go a long way, simulating a friendly clatter without the additional maintenance costs associated with mechanical wear.
This change in sound is not only as simple as upgrading technology, but also a kind of thoughtful consideration by designers for user habits and driving safety. Even behind this seemingly inconspicuous turn signal click, there is a hidden care for every detail of the car manufacturer. Through the combination of sound and technology, they improve the safety of driving and the convenience of using the vehicle.
The next time you hear that familiar click, you may remember that this is not just a reminder or a simple sound, but a small detail full of wisdom in car design. It makes driving safer and more convenient. In this way, no matter how avant-garde the development of science and technology, this kind of intimate design will never be eliminated. So, the click, still have to keep it!
Disclaimer: The information in this article comes from the Internet, which is not guaranteed to be completely correct and is for reference only.