If you are trying to match the "Variou" (varied) aspect of your requested file, look for clips labeled with these standard patterns:
: Provides a library of professionally recorded police sirens in both MP3 and WAV formats, including car, van, and horn sounds. Download Police Siren Variou TE2027601 mp3
: A slower rise and fall in pitch, typically used for long-distance alerting. If you are trying to match the "Variou"