I am looking for a clean, modern logo. I would like the "Hi-Lo" to be prominent and "Emergency Vehicles" can be less conspicuous. I'm hoping for a logo that includes red and blue (think police lights). The company name comes from the hi-lo police siren, which alternates between a high and low tone. This tone is still used by many European police agencies. In terms of a sound wave, it would look like a square wave (see attached photos). It’s not necessary but would be great if this square wave could be incorporated into the design.
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