It was nice in Japan where there's no real limit on vehicular noise. A guy grilling sweet potatoes, an ultranationalist party screaming about immigrants, and an ambulance all have equal right to scream things over a megaphone.
If you're talking about the phone for the new sexy British emergency services, I replied to the comment above not realizing you're the one who summoned me. I can included it here, too, though, if you'd prefer.