no they are not allowed to speed unless it is a emergency they are not allowed ti speed
Police cars have sirens.
Sirens on a police car either makes "Noise" or "Wails".
Police sirens
Police should not speed if there not chasing anyone or if there lights are not on or there sirens are not on
Police sirens are designed to be 120db loud from 10 feet away. This is the same volume as a jet engine or a rock concert.
Yes
the sirens tell people that a car is coming also it sends a signal to stoplights for a go.
There are quite a number of various places that one can purchase police sirens. Some of the best places to buy these are Extreme Tactical Dynamics, Office Playground, and fleetsafety.
To warn other cars it is coming through!
No they can't unless they have their sirens and lights on.
Yes, police, FBI, and bomb squad sirens can differ in sound and pattern. Typically, police sirens have distinct wailing or whooping sounds, while FBI vehicles may use similar sirens but can also incorporate different tones based on their operational needs. Bomb squad sirens might have specific patterns to indicate their presence and urgency, often using a more consistent tone. The variations help distinguish the nature of the responding units and their purposes.
Policies and laws vary from state to state, but in my locality, police officers basically use sirens (and lights) any time they are responding to an emergency call. If they are responding to a silent alarm, they may choose to not use sirens, but that's not common around here.