![]() ![]() 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. Click here to get an answer to your question A stationary police car sounds a siren with a frequency of 990 Hz. The slower example produced by the code below sounds like a police siren. This frequency determines the frequency of the fluctuations. Sound recording copyright administered by IODA for Nightwounds. Then this signal is modulated with a signal with frequency f m. Choose from 242 royalty-free Police Cop Siren sounds, starting at 2, royalty-free and ready to use in your project. ![]() The vans arrived, the blueuniformed policemen jumped out and ran. Not surprisingly, this frequency is near where hearing is most sensitive. But as quickly as it had begun, it subsided with the sound of the first police siren. ![]() 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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