Hmm I don't know, physiological processes would be my guess. Loud noise stimulates release of adrenaline from the adrenal glands..?berkeman said:
Or maybe we were worried that the police car was going to stopHootenanny said:
Hehe, speaking of which, I was driving to the gym a couple of weeks back and I notice a police car behind me. It followed me for literally ten minutes, next thing the flashing blue lights come on and sirens start wailing! My heart nearly jumped out of my chest. Anyway, I pulled over and the car just sped pastberkeman said:Or maybe we were worried that the police car was going to stop
After all, that would ruin the experiment. Plus, we may not get to submit our paper on time...
. All worked up over nothing.That's too funny. :rofl: I don't know about the OP -- probably they'll check back Sunday night to finish off the assignment? Have a good weekend, Hoot.Hootenanny said:Hehe, speaking of which, I was driving to the gym a couple of weeks back and I notice a police car behind me. It followed me for literally ten minutes, next thing the flashing blue lights come on and sirens start wailing! My heart nearly jumped out of my chest. Anyway, I pulled over and the car just sped past
Do you reckon our friend aechols1 is coming back?
Thanks Berkeman, same to you (although I'm already half way through mine)berkeman said:Have a good weekend, Hoot.
. Perhaps we shouldn't fill the thread full of chit chat until our friend returns.The Doppler Effect of a police car refers to the change in frequency of sound waves that occurs when the police car is in motion. As the car moves towards an observer, the sound waves are compressed and the frequency increases, making the sound seem higher pitched. As the car moves away from an observer, the sound waves are stretched and the frequency decreases, making the sound seem lower pitched.
The change in frequency of the siren of a police car is due to the Doppler Effect. As the car moves towards an observer, the sound waves are compressed and the frequency increases, resulting in a higher pitched sound. As the car moves away from an observer, the sound waves are stretched and the frequency decreases, resulting in a lower pitched sound.
The intensity of the siren of a police car can be affected by several factors, including the speed and direction of the car, the distance from the car, and any barriers or obstructions in the environment that may block or reflect the sound waves.
The Doppler Effect is used in police car sirens to create a distinct and attention-grabbing sound that changes in pitch as the car approaches and passes by. This helps to alert other drivers and pedestrians of the approaching police car, and can also help the police car to navigate through traffic more effectively.
Yes, the Doppler Effect can be observed with any moving object that is emitting sound waves, such as ambulances, fire trucks, and even vehicles playing loud music. It can also be observed with non-audible waves, such as light waves, as objects move closer or farther away from an observer.