Air Horns --- Serve Different Purposes

Have you ever heard an extremely loud sound of a fire truck passing by?If you have then you be sure that you have heard the sound of an air-horn.This kind of horn is widely used in ambulances,fire trucks or even in sporting events.
Now a days,world's leading manufacturers are making these horns and the material is also of very high quality( mostly chrome plated).Now a days,these horns have air compressors and 1.5 gallon tanks with them.Air-horns are also available in kits.These kits are less expensive than individual horns and the assembling is also not very hard.If you want to buy an air-horn and not sure about its sound,you can even check it before ordering.Smaller version of these horns are air-whistles which can be used for personal purposes.
For truck and trains these horns have a compressed air source which produces these loud sounds.In industries,these horns can be used to warn workers about any danger.Security guards also use these to evacuate buildings in crisis time.Personally one can use these for own safety as these are only of 10$ to 50$ depending on size and features.High quality horns emit no harmful gases and in this way they become environment friendly.Sometimes, Air Horns are also known as sonic air horns and it has other implementations too.Coaches and referees can use these to prepare players.Marine horns can make signals in boats and vessels as well.
Different air horns are for different purposes and the prices vary depending on the features.These horns now can be found online for purchase.