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10 years, 2 months ago
This does not sound like a police siren; it sounds like a sine wave with frequency modulation, which is what it is
10 years, 9 months ago
That's not the Doppler Effect, it's just changing volume.
13 years, 6 months ago
Just what i was looking for!! Great sound. Bless!!
14 years ago
No Doppler effect in this one. There should be a lower pitch in the second part.