Living in a big city means waking up with the sound of a siren and falling asleep while hearing a siren. Unfortunately, emergencies are very common and specially trained people always leap to our defense. If you have ever wondered why the siren of a fire truck or any other emergency vehicle changes pitch when they pass us, here is the scientific reason. Let’s explore it from the point of view of a specialized fire truck producer.
What is the Doppler Effect?
Studies conducted on human auditory perception have shown that the siren of a fire engine appears to change as the truck passes people because of the Doppler effect. Well, what is that? It is a simple change in frequency and wavelength of a sound. The received frequency is higher before the approach, identical in the instant of passing by, and much lower as the truck distances. To be more precise, the pitch does not change, but this is how our ears perceive it. It is the change in the frequency of waves as the fire engines and the observers are in motion relative to each other. The frequency increases when the source is approaching the observer and it decreases when they move apart from each other.
Firetruck production in Turkey
With or without the Doppler effect, fire trucks are indispensable for the public’s security. A fire apparatus is the first vehicle, which responses to EMS calls and in some cases, ambulances depend on firefighters when it comes to rescuing victims. Therefore, fire truck manufacturers are important companies, which provide the fire departments with the best solutions. If you want to check a portfolio rich in many types of fire apparatus, come and check Volkan Fire, the best fire truck producer Turkey.