Continuous Frequency Sweeping Alarm Circuit for Ambulance or Police Siren

Sweeping out the frequency of an alarm that produce continuous spectrum has some benefits. First, it improve the alertness of the signal since people normally get alerted on the perception of “change”, and it works for almost any signal (audio, visual, thermal, etc.). Second, sweeping the frequency makes sure thatĀ all people will get their sensitive spectrum covered. With these […]
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