Emd 16cyl 567 Engine Sound Enhancement Pack V1 5 His Atsf Pc Pack Update Train Sim Community The sound enhancement system includes an electronic control unit The electronic control unit is coupled to the airflow sensor The electronic control unit is configured toEngine Sound Enhancement (ESE) Adopt the incar speaker to make an active sound (which is synchronized with the original engine sound in the car), and add up with the original engine F150 engine sound enhancement