SELF-ADAPTING VARIABLE LOUDNESS AND/OR VARIABLE SOUND PATTERN EMERGENCY VEHICLE SIREN SYSTEM WITH OPTIONAL COLLISION WARNING

An example emergency vehicle siren system can include: one or more emergency lights; a siren; and a controller including a processor and memory, the memory encoding instructions which, when executed by the processor, cause the controller to modify a sound of the siren based upon a context of the vehicle, the context including at least one of a speed and location of the vehicle.