Emergency Vehicle Siren (Dorset Ambulance)IntroductionEvery day many drivers hear the sound of an emergency vehicle siren, which may come from a ambulance, police car or fire engine. Transportation of vehicles with emergency siren is allowed after having a sudden medical emergency, when your health is in danger. When drivers or passengers hear the emergency siren, they look away and try to see which way the sounds are coming from. There should be a clue from which vehicle the sound is approaching as the sound alone cannot provide any clue from which direction the vehicle is coming. For these reasons drivers are unable to take adequate preventative action until they see the emergency vehicle, i.e. when it is too late to clear the path and allow the emergency vehicle to pass (Patterson 1982). This unawareness can cost lives. If there is an improvement in the sound quality of the siren, it helps drivers to take avoidance action earlier, it will also help in reducing travel time and will also improve safety for emergency vehicles taking care of emergencies and therefore they increase the service provided. For these preventive measures Dorset ambulance is used which is used with tracker or well known as white noise siren system. The locator sound includes broadband, multi-frequency with white noise. This sound can be well heard by our ears, so we can identify the location it comes from and is useful for rapid evacuation application. It is built at the University of Leeds. Compared to other fire alarms such as conventional fire alarms, they only alert people to evacuate the building when a fire falls on...... middle of paper...... gives better alert and locatable sounds, can create greater safety, both for drivers and other road users, who will be able to travel more easily. This Dorset ambulance tracking sound technology can be useful in reducing the evacuation of people when the alarm is raised. REFERENCES: 1) Beaton, MEM a. RJ “The alarming sounds of silence.” 1 to 5.2) Fidell, S. "Effectiveness of audible warning signals for emergency vehicles." 19-26.3) Mike Holme, KA a. SM "Devon and Somersot Fire and Rescue." 1-35.4) Patterson, R. (1982). "Guidelines for acoustic warning systems on civil aircraft". Document 82017.5) DORSET AND SOMERSET AIR AMBULANCE ANNUAL REPORT 20086) http://www.soundalert.co.uk/.7) http://www.soundalert.com/emergencyvehiclewarningsystems.htm8) The tracker and the sound directional