The Hi-Lo Siren on Emergency Vehicles is proven to be better than a Traditional Wail Siren which this video explains how: [ Ссылка ]

The Hi-Lo Siren is normally found in Europe, but it's starting to become more common In the United States and I predict by 2040 that all Emergency Vehicles will have the Hi-Lo Siren in the United States.

Here's a video of an Ambulance responding with its Hi-Lo Siren in the United States: [ Ссылка ]

No Copyright Infringement Intended! This is just used for an audio clip/sound effect effect clip creation! I repeat, this is just used for an audio clip/sound effect clip creation! as this is fair use only!

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