![]() If you use a larger value of the modulation index β and a smaller value of the modulation frequency f m you can make a sound like someone tuning a radio, which is no coincidence. Next time I hear an emergency vehicle I’ll pay more attention. The faster example makes me think more of an ambulance or fire truck. This police siren light and sound contains police strobe lights and police hooter sounds. Great for emergency or cop scenes for movies based in the EuroZone. The slower example produced by the code below sounds like a police siren. Get the incredible police siren sounds with police lights flashing. Choose from 242 royalty-free Police Cop Siren sounds, starting at 2, royalty-free and ready to use in your project. This is a sound of Police siren and it last for around 50 seconds. This frequency determines the frequency of the fluctuations. Click here to get an answer to your question A stationary police car sounds a siren with a frequency of 990 Hz. Then this signal is modulated with a signal with frequency f m. Not surprisingly, this frequency is near where hearing is most sensitive. ![]() The Python code below starts with a carrier wave at f c = 1500 Hz. ![]() These are sounds with high fluctuation strength. Along the way I discovered how to create files that sound like police sirens. Yesterday I was looking into calculating fluctuation strength and playing around with some examples. ![]()
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