The experimental setup involved a series of equipment and software required to attain the necessary data. The siren used was an eQ2B electronic siren system. Two 100 Watt speakers were used to emit the sound. The auto setting was the primary signal used and the air horn setting was cycled on during half of the recordings. The measurements were recorded at approximate five second intervals in an attempt to record a full cycle of the siren signal. To record the measurements, Bruel & Kjaer (B&K) PULSE Time Data Recorder software was used. A binaural Head and Torso Simulator (HATS) was positioned in the driver’s seat to record the signals. The siren device was placed on a portable table approximately 3ft in height with the speakers separated from each other by a distance of approximately 1 meter to simulate the corresponding mounting position at the bumper of an emergency vehicle.